The Physics Department | Technion – Israel Institute of Technology

Thesis

A. Keren, Antiferromagnetism in the super-degenerate kagomé lattice and cuprates. Supervisor:Y.J. Uemura, Columbia University USA, (1994)

Journal Publications

Published

  1. K. Panda, D. Potashnikov, A. Pesach, M. Barbier, A. Eyal, T. Ouisse, A. Keren, and N. Bachar, Raman spectroscopy of the magnetic coupling in Gd-i-MAX, Phys. Rev. B 110, 214412 (2024).
  2. A. Samanta, I. Mangel, A. Keren, D. P. Arovas, and A. Auerbach, The two critical temperatures conundrum in La1.83 Sr0.17 CuO4, SciPost Phys. 16, 148 (2024).
  3. I. Mangel and A. Keren, Ground-state interplane superconducting coherence length of La1.875Sr0.125CuO4, Phys. Rev. B 109, 094519 (2024).
  4. A. Peri, I. Mangel and A. Keren, Superconducting Stiffness and Coherence Length of FeSe0.5Te0.5 Measured in a Zero-Applied Field, Condensed Matter, 8, 39 (2023).
  5. A. Khanukov, I. Mangel, S. Wissberg, A. Keren, and B. Kalisky, Mixed superconducting state without applied magnetic field, Phys. Rev. B 106, 144510 (2022).
  6. A. Keren, N. Blau, N. Gavish, O. Kenneth, Y. Ivry, M. Suleiman, Stiffness and coherence length measurements of ultra-thin superconductor, and implications to layered superconductors, Supercond. Sci. Technol. 35 075013 (2022).
  7. D. Potashnikov, E. N. Caspi, A. Pesach, Q. Tao, J. Rosen, D. Sheptyakov, H. A. Evans, C. Ritter, Z. Salman, P. Bonfa, T. Ouisse, M. Barbier, O. Rivin, and A. Keren, Magnetic structure determination of high-moment rare-earth-based laminates, Phys. Rev. B 104, 174440 (2021).
  8. N. Gavish, O. Kenneth, and A. Keren, Ginzburg–Landau model of a Stiffnessometer — A superconducting stiffness meter device, Physica D: Nonlinear Phenomena 415, 132767 (2021).
  9. D. Potashnikov, E. N. Caspi, A. Pesach, S. Kota, M. Sokol, L. A. Hanner, M. W. Barsoum, H. A. Evans, A. Eyal, A. Keren, and O. Rivin, Magnetic properties of ( Fe1 − x Mnx )2 Al B2 and the impact of substitution on the magnetocaloric effect, Phys. Rev. Materials 4, 084404 (2020).
  10. I. Mangel, I. Kapon, N. Blau, K. Golubkov, N. Gavish, and A. Keren, Stiffnessometer: A magnetic-field-free superconducting stiffness meter and its application Phys. Rev. B 102, 024502 (2020).
  11. Amit Keren, Wayne Crump, Ben P. P. Mallett, Shen V. Chong, Itai Keren, Hubertus Luetkens, and Jeffery L. Tallon, Relevance of magnetism to cuprate superconductivity: Lanthanides versus charge-compensated cuprates, Phys. Rev. B 100, 144512 (2019).
  12. M. Bluschke, M. Yaari, E. Schierle, G. Bazalitsky, J. Werner, E. Weschke, and A. Keren, Adiabatic variation of the charge density wave phase diagram in the 123 cuprate (CaxLa1−x)(Ba1.75−xLa0.25+x)Cu3Oy, Phys. Rev. B 100, 035129 (2019).
  13. I. Kapon, Z. Salman, I. Mangel, T. Prokscha, N. Gavish and A. Keren, Phase transition in the cuprates froma magnetic-field-free stiffness meter viewpoint, Nature Communications 10, 2463 (2019).
  14. Silvia Müllner, Wayne Crump, Dirk Wulferding, Benjamin P. P. Mallett, Peter Lemmens, Amit Keren, and Jeffery L. Tallon, Systematic Raman study of optical phonons in RBa2Cu3O6+δ (R = Y, Dy, Gd, Sm, Nd): Antiferromagnetic coupling strength versus lattice parameters, Phys. Rev. B 99, 094525 (2019).
  15. O. Negri, M. Zaberchik, G. Drachuck, A. Keren, and M. Reznikov, Zero energy states at a normal-metal/cuprate-superconductor interface probed by shot noise, Phys. Rev. B 97, 214504 (2018).
  16. L. Chaix, E. W. Huang, S. Gerber, X. Lu, C. Jia, Y. Huang, D. E. McNally, Y. Wang, F. H. Vernay, A. Keren, M. Shi, B. Moritz, Z.-X. Shen, T. Schmitt, T. P. Devereaux, and W.-S. Lee,  Resonant inelastic x-ray scattering studies of magnons and bimagnons in the lightly doped cuprate La2-xSrxCuO4, Phys. Rev. B 97, 155144 (2018).
  17. M. Yaari and A. Keren, Temperature changes of the Fe8 molecular magnet during its spin reversal process, Phys. Rev. B 95, 174435 (2017).
  18. I. Kapon, D. S. Ellis, G. Drachuck, G. Bazalitski, E. Weschke, E. Schierle, J. Strempfer, C. Niedermayer, and A. Keren, Opening a nodal gap by fluctuating spin-density wave in lightly doped La2-xSrxCuO4, Phys. Rev. B 95, 104512 (2017).
  19. D. S. Ellis, Y. Huang, P. Olalde-Velasco, M. Dantz, J. Pelliciari, G. Drachuck, R. Ofer, G. Bazalitsky, J. Berger, T. Schmitt, and A. Keren, Correlation of the superconducting critical temperature with spin and orbital excitations in (CaxLa1−x)(Ba1.75−xLa0.25+x)Cu3Oy as measured by resonant inelastic x-ray scattering, Phys. Rev. B 92, 104507 (2015).
  20. D. Wulferding, Meni Shay G. Drachuck, R. Ofer, G. Bazalitsky, Z. Salman, P. Lemmens, and A. Keren, Relation between cuprate superconductivity and magnetism: A Raman study of (CaLa)1(BaLa)2Cu3Oy, Phys. Rev. B 90, 104511 (2014).
  21. T. Leviant, A. Keren, E. Zeldov, and Y. Myasoedov, Quantum ignition of deflagration in the Fe8 molecular magnet, Phys. Rev. B 90, 134405 (2014).
  22. T. Leviant, S. Hanany, Y. Myasoedov, and A. Keren, Testing the radiation emanating from the molecular nanomagnet Fe8 during magnetization reversals, Phys. Rev. B 90, 054420 (2014).
  23. T. Cvitanić, D. Pelc, M. Požek, E. Amit, and A. Keren, 17O-NMR Knight shift study of the interplay between superconductivity and pseudogap in (CaxLa1−x)(Ba1.75−xLa0.25+x)Cu3Oy, Phys. Rev. B 90, 054508 (2014).
  24. A. H. Devir-Wolfman, B. Khachatryan, B. R. Gautam, L. Tzabary, A. Keren, N. Tessler, Z. V. Vardeny, and E. Ehrenfreund, Short-lived charge-transfer excitons in organic photovoltaic cells studied by high-field magneto-photocurrent, Nature Communications 5, Article number: 4529, July (2014).
  25. O. Ofer, L. Marcipar, V. R. Chandra, S. Gazit, D. Podolsky, D. P. Arovas, and A. Keren, Dynamic spin fluctuations at T → 0 in a spin-1/2 ferromagnetic kagome lattice, Phys. Rev. B 89, 205116 (2014).
  26. G. Drachuck, E. Razzoli, R. Ofer, G. Bazalitsky, R. S. Dhaka, A. Kanigel, M. Shi, and A. Keren, Linking dynamic and thermodynamic properties of cuprates: An angle-resolved photoemission study of (CaxLa1−x)(Ba1.75−xLa0.25+x)Cu3Oy (x = 0.1 and 0.4), Phys. Rev. B 89, 121119(R) (2014).
  27. G. Drachuck, E. Razzoli, G. Bazalitski, A. Kanigel, C. Niedermayer, M. Shi, A. Keren, Comprehensive study of the spin-charge interplay in antiferromagnetic La2-xSrxCuO4, Nature Communications 5, Article number: 3390, February (2014).
  28. S. Asban, M. Shay, M. Naamneh, T. Kirzhner, and A. Keren, Strong- versus weak-coupling paradigms for cuprate superconductivity, Phys. Rev. B 88, 060502(R) (2013).
  29. E. Razzoli, G. Drachuck, A. Keren, M. Radovic, N. C. Plumb, J. Chang, J. Mesot, M. Shi, Evolution from a nodeless gap to d(x2-y2) form in underdoped La(2-x)SrxCuO4, Phys. Rev. Lett. 110, 047004 (2013).
  30. I. Felner, M. I. Tsindlekht, G. Drachuck and A. Keren, Anisotropy of the upper critical fields and the paramagnetic Meissner effect in La1:85Sr0:15CuO4 single crystals, J. Phys. Condens. Matter 25, 065702 (2013).
  31. G. Drachuck, M. Shay, G. Bazalitsky, Z. Salman, A. Amato, C. Niedermayer, D. Wulferding, P. Lemmens, and Amit Keren, New Perspectives for Cuprate Research: A CLBLCO Single Crystal, J. Supercond. Nov. Magn., June (2012).
  32. G. Drachuck, M. Shay, G. Bazalitsky, J. Berger, and A. Keren, Parallel and perpendicular susceptibility above Tc in La2-xSrxCuO4 single crystals, Phys. Rev. B 85, 184518 (2012).
  33. E. Amit, A. Keren, J. S. Lord, and P. King, A Precise Measurement of the Oxygen Isotope Effect on the Neel Temperature in Cuprates, Advances in Cond Matter Phys, 178190 (2011).
  34. O. Ofer, A. Keren, J.H. Brewer, T.H. Han and Y.S. Lee, The Herbertsmithite Hamiltonian: mSR measurements on single crystals, J. Phys.: Condens. Matter 23, 164207 (2011).
  35. E. Razzoli1, Y Sassa, G Drachuck, M Mansson, A Keren, M Shay, M H Berntsen, O Tjernberg, M Radovic, J Chang, S Pailhes, N Momono, M Oda, M Ido, O J Lipscombe, S M Hayden, L Patthey, J Mesot and M Shi, The Fermi surface and band folding in La2-xSrxCuO4, probed by angle-resolved photoemission, New J. Phys.12, 125003 (2010).
  36. E. Amit and A. Keren, Critical-doping universality for cuprate superconductors: Oxygen nuclear-magnetic-resonance investigation of (CaxLa1-x)(Ba1.75-xLa0.25-x)Cu3Oy, Phys. Rev. B 82, 172509 (2010).
  37. O. Ofer, A. Keren, J. S. Gardner, Y. Ren, and W. A. MacFarlane, Origin of magnetic freezing in pyrochlore Y2Mo2O7, Phys. Rev. B 82, 092403 (2010).
  38. D. Di Castro, A. Kanigel, A. Maisuradze, A. Keren, P. Postorino, D. Rosenmann, U. Welp, G. Karapetrov, H. Claus, D. G. Hinks, A. Amato, and J. C. Campuzano, Muon spin rotation study of the magnetic penetration depth in the intercalated graphite superconductor CaC6, Phys. Rev. B 82, 014530 (2010).
  39. O. Shafir, A. Keren, S. Maegawa, M. Ueda, and E. Shimshoni, Magnetic quantum tunneling in Fe8 with excited nuclei, Phys. Rev. B 82, 014419 (2010).
  40. A. Keren, Evidence of magnetic mechanism for cuprate superconductivity, New Journal of Physics 11, 065006 (2009).
  41. R. Ofer and A. Keren, Nutation versus angular-dependent NQR spectroscopy and impact of underdoping on charge inhomogeneities in YBa2Cu3Oy, Phys. Rev. B 80, 224521 (2009).
  42. L. Marcipar, O. Ofer, A. Keren, E. A. Nytko, D. G. Nocera, Y. S. Lee, and J. S. Helton, and Ch. Bains, Muon-spin spectroscopy of the organometallic spin-1/2 kagome-lattice compound Cu(1,3-benzenedicarboxylate), Phys. Rev. B 80, 132402 (2009).
  43. M. Shai, A. Keren, G. Koren, A. Kanigel, O. Shafir, L. Marcipar, G. Nieuwenhuys, E. Morenzoni, A. Suter, and Th. Prokscha, M. Dubman, and D. Podolsky, Interaction between the magnetic and superconducting order parameters in a La1.94Sr0.06CuO4 wire studied via muon spin rotation, Phys. Rev. B 80, 144511 (2009).
  44. O. Shafir and A. Keren, Electromagnetic radiation emanating from the molecular nanomagnet Fe8, Phys. Rev. B 79, 180404(R) (2009).
  45. O. Ofer and A. Keren, The symmetry of the spin Hamiltonian in herbertsmithite, a spin-1/2 kagome lattice, Phys. Rev. B 79, 134424 (2009).
  46. R. Ofer, A. Keren, O. Chmaissem and A. Amato, Universal doping dependence of the ground-state staggered magnetization of cuprate superconductors, Phys. Rev. B 78, 140508(R) (2008).
  47. Y. Lubashevsky and A. Keren, Experimental investigation of the origin of the crossover temperature in cuprate superconductors via dc magnetic susceptibility, Phys. Rev. B 78, 020505(R) (2008).
  48. O. Ofer, A Keren and Ch. Baines, Lack of static lattice distortion in Tb2Ti2O7, J. Phys.: Condens. Matter. 19, 145270 (2007).
  49. A. Keren, O. Shafir, E. Shimshoni, V. Marvaud, A. Bachschmidt and J. Long, Experimental Estimates of Dephasing Time in Molecular Magnets, Phys. Rev. Lett. 98, 257204 (2007).
  50. R. Ofer, G. Bazalitsky, A. Kanigel, A. Keren, J. S. Lord, and A. Amato, A magnetic analog of the isotope effect in cuprates, Phys. Rev. B 74, 220508(R) (2006).
  51. A. Keren, A. Kanigel, and G. Bazalitsky, Evidence for two fluids in cuprate superconductors from a nuclear resonance study of (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3Oy, Phys. Rev. B 74, 172506 (2006).
  52. A. Kanigel, A. Keren, In-plane hole density of cuprates; nuclear resonance study over the full doping range, Phys. Rev. B 74, 012505 (2006).
  53. R. Ofer, S. Levy, A. Kanigel, and A. Keren, Charge-Inhomogeneity doping relations in YBa2Cu3Oy Detected by Angle Dependent Nuclear Quadrupole Resonance, Phys. Rev. B 73, 012503 (2006).
  54. O. Shafir, A. Keren, S. Megawa, M. Ueda, A. Amato, C. Bains, Demonstrating multibit magnetic memory in the Fe8 high-spin molecule by muon spin rotation, Phys. Rev. B 72, 092410 (2005).
  55. A. Kanigel, A. Keren, A. Knizhnik, O. Shafir, Universal linear relations between susceptibility and Tc in cuprates, Phys. Rev. B 71, 224511 (2005).
  56. E. Sagi, O. Ofer, A. Keren, J. S. Gardner, Quest for Frustration Driven Distortion in Y2Mo2O7, Phys. Rev. Lett.94, 237202 (2005).
  57. P. Carretta, A. Keren, J.S. Lord, I. Zucca, S.M.Kazakov and J. Karpinski, Anomaly in YBa2Cu4O8 charge distribution below Tc: a zero-field μSR study, Phys. Rev. B 71, 052507 (2005).
  58. A. Zakrassov, V. Shteiman, Y. Sheynin, B. Tumanskii, M. Botoshansky, M Kapon, A. Keren, M. Kaftory, T. E.Vos and J. S.Miller, Synthesis, structural,and magnetic characterization of substituted benzoimidazole-l-yl N,N’-dioxides, J .Mater.Chem. 14, 1827 (2004).
  59. A. Keren, Muons as probes of dynamical spin fluctuations: some new aspects , J. Phys.: Condens. Matter 16 ,S4603–S4618 (2004).
  60. Kanigel, A. Keren, L. Patlagan, K. B. Chashka, B. Fisher, P. King, A. Amato, Muon Spin Relaxation Measurements in NaxCoO2 yH2O, Phys. Rev. Lett 92, 257007 (2004).
  61. S. Levy and A. Keren, Pure nuclear quadrupole resonance determination of the electric field gradient asymmetry for broad lines, JMR 167, 317 –321 (2004).
  62. A. Keren, J. Gardner, G. Ehlers, A. Fukaya, E. Sagi and Y. J. Uemura, Dynamic properties of a diluted pyrochlore cooperative paramagnet (TbpY1-p)2Ti2O7, Phys. Rev. Lett. 92, 107204 (2004).
  63. J. S. Gardner, A. Keren, G. Ehlers, C. Stock, Eva Segal, J. M. Roper, B. Fak, M. B. Stone, P. R. Hammar, D. H. Reich, and B. D. Gaulin, Dynamic frustrated magnetism in Tb2Ti2O7 at 50 mK, Phys. Rev. B 68, 180401(R) (2003).
  64. A. Fukaya,Y. Fudamoto, I.M. Gat, T. Ito, M. I. Larkin, A.T. Savici,Y. J. Uemura, P. P. Kyriakou, G. M. Luke, M. T. Rovers, K.M. Kojima, A. Keren, M. Hanawa, and Z. Hiroi, Muon Spin Relaxation and Susceptibility Studies of the Pure and Diluted Spin 12 Kagome´-Like Lattice System (CuxZn1-x)3V2O7(OH2)H2O, Phys. Rev. Lett. 91, 207603 (2003).
  65. J. A. Chakhalian, R. F. Kiefl, R. Miller, J. Brewer S. R. Dunsiger G. Morris W. A. MacFarlane J. E. Sonier S. Eggert I. Affleck A. Keren Local Magnetic Susceptibility of the Positive Muon in the Quasi-One-Dimensional S = 1/2 Antiferromagnet Dichlorobis (Pyridine) Copper (II), Phys. Rev. Lett. 91, 027202 (2003).
  66. A. Keren and A. Kanigel, Common energy scale for magnetism and superconductivity in cuprates, Phys. Rev. B 68, 012507 (2003).
  67. A. Keren, A. Kanigel, J. S. Lord, and A. Amato, Universal superconducting and magnetic properties of the (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3Oy system: a mSR investigation, Solid State Commun. 123, 39 (2003).
  68. A. Keren, F. Gulener, I. Campbell, G. Bazalitsky, and A. Amato, Dynamical crossover in an Ising spin glass above Tg; a mSR investigation of Fe0.05TiS2, Phys. Rev. Lett. 89, 107201 (2002).
  69. A. Kanigel, A. Keren, Y. Eckstein, A. Knizhnik, J. Lord, and A. Amato, Common energy scale for magnetism and superconductivity in underdoped cuprates: a mSR investigation of (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3Oy, Phys. Rev. Lett. 88, 137003 (2002).
  70. Z. Salman A. Keren, P. Mendels, A. Scuiller, M. Verdaguer, J. Lord C. Baines, Dynamics at T-> 0 in half-integer isotropic high spin molecules, Phys. Rev. B 65, 132403 (2002).
  71. K. B. Chashka, B. Fisher, J. Genossar, A. Keren, L. Patlagan, and G. M. Reisner, E. Shimshoni and J. F. Mitchell, Linear and nonlinear electronic transport in weakly insulating double layered manganites, Phys. Rev. B 65, 134441 (2002).
  72. A. Keren and J. S. Gardner , Frustration driven lattice distortion; an NMR investigation of Y2Mo2O7, Phys. Rev. Lett. 87, 177201 (2001).
  73. A. Keren, G. Bazalitsky, I. Campbell and J. Lord, Probing exotic spin correlations by muon spin depolarization measurements with application to spin glass dynamics, Phys. Rev. B 64, 54403 (2001).
  74. P. Mendels, A. Keren, L. Limot, M. Mekata, G. Collin, M. Horvatic, Ga NMR Study of the Local Susceptibility in Kagomé-Based SrCr9pGa12-9pO19: Pseudogap and Paramagnetic Defects, Phys. Rev. Lett. 85, 3496 (2000).
  75. A. Keren, Y. J. Uemura, G. Luke, P. Mendels, M. Mekata and T. Asano, Magnetic dilution in the geometrically frustrated SrCr9pGa12-9pO19, and the role of local dynamics: a mSR study, Phys. Rev. Lett. 84, 3450 (2000).
  76. M. Mekata, T. Asano, H. Nakamura, M. Shiga, K. M. Kojima, G. M. Luke, A. Keren, W. D. Wu, M. Larkin, Y. J. Uemura, S. Dunsiger, and M. Gingras, Ground state of the geometrically frustrated system Y(Sc)Mn2 studid by muon spin relaxation, Phys. Rev. B 61, 4088 (2000).
  77. A. Keren and Ophir M. Auslaender, Spin Echo Decay in a Stochastic Field Environment, Phys. Rev. B 60, 9279 (1999).
  78. A. Keren, P. Mendels, M. Horvatic, F. Ferrer, Y. J. Uemura, M. Mekata and T. Asano, 69,71Ga NMR in the kagomé lattice compound SrCr8Ga4O19, Phys. Rev. B 57, 10745 (1998).
  79. A. Keren, H. Alloul, P. Mendels, Y. Yoshinari, NMR study of 17O transverse relaxation in YBa2Cu3(16O1-c17Oc)7, Phys. Rev. Lett. 78, 3547 (1997).
  80. J. Bobroff, H. Alloul, Y. Yoshinari, A. Keren, P. Mendels, N. Blanchard, G. Collin, and J.-F. Maroucco, Using Ni Substitution and 17O NMR to Probe the Susceptibility c(q) in Cuprates, Phys. Rev. Lett. 79, 2117 (1997).
  81. A. Keren, P. Mendels, I. A. Campbell, and J. Lord Probing the spin-spin dynamical autocorrelation function in spin glass AgMn above Tg using mSR, Phys. Rev. Lett. 77, 1386 (1996).
  82. S. R. Dunsiger, R. F. Kiefl, K. H. Chow, B. D. Gaulin, M. J. Gingras, J. E. Greedan, A. Keren, K. Kojima, G. M. Luke, W. A. MacFarlane, N. P. Raju, J. E. Sonier, Y. J. Uemura, and W. D. Wu, Muon spin relaxation investigation of the spin dynamics of geometrically frustrated antiferromagnets Y2Mo2O7 and Tb2Mo2O7, Phys. Rev. B 54, 9019 (1996).
  83. B. Nachumi, A Keren, K. Kojima, M. Larkin, G. M. Luke, J. Merrin, O. Tchernyshev, Y. J. Uemura, N. Ichikawa, M. Goto, and S. Uchida, Muon Spin Relaxation Stadies of Zn-Substitution Effects in High-T Cuprate Superconductors, Phys. Rev. Lett. 77, 5421 (1996).
  84. A. Keren, K. Kojima, L. P. Le, G. L. Luke, W. D. Wu, Y. J. Uemura, M. Takano, H. Dabkowska, and M.J. P. Gingras, mSR Measurements in the Kagomé Lattice Systems: Cr-Jarosite and Fe-Jatosite, Phys. Rev. B 53, 6451 (1996).
  85. G. L. Luke, A. Keren, K. Kojima, L. P. Le, W. D. Wu, Y. J. Uemura, G. M. Kalvius, A. Kratzer, G. Nakamoto, T. Takabatake and M. Ishikawa, mSR Measurements of Spin Fluctuations in CePt2Sn2, Physica B 206&207, 222 (1995).
  86. K. Kojima, A. Keren, G. M. Luke, B. Nachumi, W. D. Wu, Y. J. Uemura, M. Azuma and M.Takano, Magnetic behavior of the 2-leg and 3-leg spin ladder cuprates Srn-1Cun+1O2n, Phys. Rev. Lett. 74, 2812 (1995).
  87. K. Kojima, A. Keren, L. P. Le, G. M. Luke, B. Nachumi, W. D. Wu, Y. J. Uemura, K. Kiyono, S. Miyasaka, H. Takagi, and S. Uchida, mSR and Magnetic Susceptibility Measurements in Haldane System (Y2-xCax)Ba(Ni1-yMgy)O5, Phys. Rev. Lett. 74, 3471 (1995).
  88. Y. J. Uemura, A. Keren, K. Kojima, L. P. Le, G. L. Luke, W. D. Wu, Y. Ajiro, T. Asano, Y. Kuriyama, M. Mekata, H. Kikuchi, and K. Kakurai, Spin Fluctuations in Frustrated Kagomé Lattice System SrCr8Ga4O19 Studied by Muon Spin Relaxation, Phys. Rev. Lett. 73, 3306 (1994).
  89. G. L. Luke, A. Keren, K. Kojima, L. P. Le, B. J. Sternlieb, W. D. Wu, Y. J. Uemura, Y. Onuki, and T.Komatsubara, Competition Between Magnetic Order and Superconductivity in CeCu2.2Si2, Phys. Rev. Lett. 73, 1853 (1994).
  90. W. D. Wu, A. Keren, L. P. Le, G. L. Luke, Y. J. Uemura, Y.Dalichaouch, and M.B.Maple, mSR Studies of Magnetic Order in Y1-xUxPd3 and UPd4, Phys. Rev. Lett. 72, 3722 (1994).
  91. A. Keren, Generalization of the Abragam Relaxation Function to a Longitudinal Field, Phys. Rev. B 50, 10039 (1994).
  92. A. Keren, Dynamical Simulation of Spins on Kagomé and Square Lattices, Phys. Rev. Lett. 72, 3254 (1994).
  93. L. P. Le, A. Keren, G. L. Luke, W. D. Wu, Y. J. Uemura, M. Tamura, M. Ishikawa, and M. Kinoshita, Searching for Spontaneous Magnetic Order in an Organic Ferromagnet mSR Studies of b-phase p-NPNN, Chemical Physics Letters 206, 405 (1993).
  94. A. Keren, L. P. Le, G. L. Luke, B. J. Sternlieb, W. D. Wu, Y. J. Uemura, S. Tajima, and S. Uchida, Muon Spin Rotation Measurements in Infinite Layer and Infinite Chain Cuprate Antiferromagnets: Ca0.86Sr0.14CuO2 and Sr2CuO3, Phys. Rev. B 48, 12926 (1993).
  95. L. P. Le, A. Keren, G. L. Luke, B. J. Sternlieb, W. D. Wu, Y. J. Uemura, J. H. Brewer, T. M. Riseman, R. V. Upasani, L. Y. Chiang, W. Kang, P. M. Chaikin, T. Csiba and G. Gruner, Muon Spin Rotation and Relaxation Studies in (TMTSF)2-X Compounds, Phys. Rev. B 48, 7284 (1993).
  96. W. D. Wu, A. Keren, L. P. Le, B. J. Sternlieb, G. L. Luke, Y. J. Uemura, P. Dosanjh, T. M. Riseman, Muon-Spin-Relaxation Studies of Flux Pinning in Bi2Sr2CaCu2O8 and Pb0.7Bi1.3Sr2CaCu2O8, Phys. Rev. B 47, 8172 (1993).
  97. Y. J. Uemura, A. Keren, L. P. Le, G. L. Luke, W. D. Wu, Y. Kubo, T. Manako, Y. Shimakawa, M. Subramanian, J. T. Markert, Magnetic-field Penetration Depth in Tl2Ba2CuO6+d in the Overdoped Regime, Nature 364, 6438, 605 (1993).
  98. G. L. Luke, A. Keren, L. P. Le, W. D. Wu, Y. J. Uemura, D. A. Bonn, L. Taillefer and J. D. Garrett, Muon Spin Relaxation in UPt3, Phys. Rev. Lett. 71, 1466 (1993).
  99. W. D. Wu, A. Keren, L. P. Le, G. L. Luke, Y. J. Uemura, C. L. Seaman, Y. Dalichaouch, and M. B. Maple, mSR Study of Spin-Glass Freezing in Y1-xUxPd3 and UPd4: Disappearance of the ordered moment in the ‘Kondo regime’, Physica B 186-188, 344 (1993).
  100. G. L. Luke, A. Keren, L. P. Le, W. D. Wu, Y. J. Uemura, D. A. Bonn, L. Taillefer, and J. D. Garrett, Muon Spin Relaxation in the Heavy Fermion System UPt3, Physica B 186-188, 264 (1993).
  101. Y. J. Uemura, A. Keren, L. P. Le, G. L. Luke, B. J. Sternlieb, W. D. Wu, J. H. Brewer, R. L .Whetten, S. M. Huang, S. Lin, R. B. Kaner, F. Diederich, S. Donovan, G. Gruner and K. Holczer, Magnetic-Field Penetration Depth in K3C60 Measured by Muon Spin Relaxation, Nature 352, 605 (1991).

Invited Papers

  1. A. Keren, Evidence of magnetic mechanism for cuprate superconductivity, New J. Phys. 11, 065006 (2009).
  2. P. Carretta and A. Keren, NMR and mSR in highly frustrated magnets, in C. Lacroix, P. Mendels, F. Mila (Eds.) Introduction to frustrated magnetism,2011. arXiv:0905.4414.
  3. A. Keren, Stochastic Landau-Zener model, and experimental estimates of dephasing time in molecular magnets, Springer-Verlag, Milano, Italia.
  4. A. Keren, Muons as probes of dynamical spin fluctuations: some new aspects, special issue on muon spectroscopy, J. Phys.: Condens. Matter 16 ,1–16 (2004).

Invited lectures

* – Plenary talk in a conference where not all participants are invited, but there are no parallel sessions.

$ – Plenary talk in a conference where all participant are invited and there are no parallel sessions.

# – Plenary talk in a conference where not all participant are invited and there are parallel sessions.

  1. #Magnetic Equivalent of the isotope effect in cuprates , JEMS2012, Parma Italy 2012.
  2. *Magnetic Equivalent of the isotope effect in cuprates , Physics of Low-Dimensional Conductors, Zagreb, Croatia, 2012.
  3. $Magnetic Equivalent of the isotope effect in cuprates , Swiss Light Source workshop, Beatenberg, Switzerland, 2012.
  4. *Magnetic Equivalent of the isotope effect in cuprates , 1st China-Israel Meeting, Jerusalem, 2011.
  5. *Critical-doping universality for cuprate superconductors: Oxygen nuclear-magnetic-resonance investigation of (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3Oy, Trogir, Croatia, 2011.
  6. *The interaction between the magnetic and superconducting order parameters in a La1.94Sr0.06CuO4 wire, Cancun, Mexico, 2011.
  7. *Resonance techniques in Highly Frustrated Magnets, Slovenia, Feb 2010.
  8. $The Y2Mo2O7 puzzle, HFM workshop, Oxford U.K. Sep-2009.
  9. $Interaction between the magnetic and superconducting order parameters in cuprates, vortices work shop, Aspen, U.S.A. 2009.
  10. *Coma-Ruga 2009, Intenational workshop on Nanomagnetism and Superconductivity, Barcelona, Spain 2009.
  11. *Magnetic equivalent of the isotope effect in cuprates, Stripe, Erich, Italy 2008.
  12. *Magnetic equivalent of the isotope effect in cuprates, MiCuO 2007, Parma, Italy.
  13. $Magnetic equivalent of the isotope effect in cuprates and more experiments on correlated electrons, Moments and Multiplets program, KITP, Santa Barbara, U.S.A. 2007.
  14. $Magnetic equivalent of the isotope effect in cuprates, High temperature superconductivity work shop, Aspen, U.S.A 2007.
  15. *Magnetic equivalent of the isotope effect in cuprates, Gordon Research conference, Les Diablerets, Switzarland 2007.
  16. *Magnetic resonance in films, Annual meeting of the Israeli magnetic resonance, Technion Israel (given by Menahem Shai) 2007.
  17. *The origin of the pseudogap in high temperature superconductors, Minerva meeting, Cfar Ha Macabia Israel 2007
  18. *MuSR in Highly Frustrated Magnets, , the International Centre for Theoretical Physics in Trieste, Italy 2007.
  19. *Magnetic equivalent of the isotope effect in cuprates, Stripe06, Rome, Italy 2006.
  20. *Isotropic High spin Molecules, training school on NMR, MRI, µSR and MÖssbauer techniques, Pavia, Italy 2006.
  21. *A quest for frustration driven lattice Distortion, HFM meeting, Osaka, Japan 2006.
  22. #Charge inhomogeneity disorder relations in YBa2Cu3Oydetected by angle dependent nuclear quadrupole resonance, IPS meeting Carmiel 2005.
  23. *Detection of inhomogeneity-disorder correlation in YBa2Cu3Oyby angle dependent nuclear quadrupole resonance, International ICAM Workshop NMR/EPR of Correlated Electron Superconductors, Dresden, Germany 2005.
  24. *Common energy scale for magnetism and superconductivity in cuprates, Minerva meeting, Tel Aviv 2005.
  25. *Glass Transitions (dynamic aspects), Summer school on phase transitions, Zuoz Switzerland 2004.
  26. *Common energy scale for magnetism and superconductivity in underdoped cuprates, Minerva meeting, Blaubeuren, Germany 2003.
  27. *Common energy scale for magnetism and superconductivity in underdoped cuprates: a mSR investigation of (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3OyHigh Tc workshop, Virginia U.S.A, 2002.
  28. #Dynamics at T-> 0 in half-integer isotropic high spin molecules, The 9th international conference on muon spin resonance, Virginia, U.S.A, 2002.
  29. *Frustration driven lattice distortion; an NMR investigation of Y2Mo2O7: Indo-Israeli, Jerusalem, Israel 2002.
  30. *New frontiers in magnetism with high magnetic fields: High Magnetic Field mSR workshop, Zurich Switzerland, 2002.
  31. #Geometrically frustrated magnets, and the role of local dynamics: a mSR study, IPS Tel-Aviv, 2001.
  32. *Superconducting-glass phase separation in the superconducting state of under-doped cuprates as detected by mSR: Minerva-ISF, Cfar Hamacabia, Israel 2001.
  33. *Frustration driven lattice distortion; an NMR investigation of Y2Mo2O7: Highly Frustrated Magnets 2000 Waterloo Canada, 2000.
  34. *Magnetic field-time scaling relations and exotic spin correlations: a mSR study of spin-glasses, The 8th international conference on muon spin resonance, Les Diableres, Switzerland, 1999.
  35. #Magnetic field time scaling relations and exotic spin correlation: a mSR study, The Annual Magnetic Resonance Meeting, Weizmann Institute, 1999.
  36. #Spin glass dynamics above Tg:a mSR study of AgMn,5th French solid state conference, Orleans France, 1996.
  37. *Spin dynamics in magnetic insulators, Muon spectroscopy in materials science, Oxford UK, 1995.

Contributed talks and posters

  1. The symmetry of the spin Hamiltonian for some kagom? systems, Paris France, 2010.
  2. Magnetic equivalent of the isotope effect in cuprates, LT25, Amsterdam, Holland (2008).
  3. Ground state and excitation properties of the spin 1/2 kagome lattice, the International Centre for Theoretical Physics in Trieste, Italy (2007). (presented by Oren Ofer).
  4. Frustration Driven Lattice Distortion, Highly Frustrated Magnets workshop 2005, LaLond France (presented by Oren Ofer).
  5. Magnetic equivalent of the isotope effect in cuprates, International ICAM Workshop NMR/E PR of Correlated Electron Superconductors, Dresden, Germany 2005.> ( presented by Rinat Ofer).
  6. Manetope effect in cuprates, International conference on muon spin spectroscopy 2005, Oxford, U.K. (presented by Rinat Ofer).
  7. Common energy scale for magnetism and superconductivity, workshop on superconductivity 2004, Miami U.S.A (presented by Amit Kanigel).
  8. A quest for frustration driven lattice distortion. HFM 2003, Grenoble France (presented by Eva Sagi).
  9. Charge Inhomogeneity in YBa2Cu3Oy Detected by Angle Dependent Nuclear Quadrupole Resonance, ICM 2003 Rome Italy (presented by Shahar Levi).
  10. Extending the validity of the Uemura relation, ICM 2003 Rome Italy (presented by Amit Kanigel).
  11. Multi Bit magnetic memory with the Fe8 molecule, ICM 2003 Rome Italy (presented by Oren Shafir).
  12. Multi Bit magnetic memory with the Fe8 molecule, Low Dimension Magnet conference, Florence Italy 2003 (presented by Oren Shafir).
  13. Isotropic High Spin Molecules, Low Dimension Magnet conference, Florence Italy 2003.
  14. Common energy scale for magnetism and superconductivity, LT23 Hiroshima Japan (presented by Amit Kanigel).
  15. Isotropic High Spin Molecules, LT23 Hiroshima Japan (presented by Zaher Salman).
  16. Isotropic High Spin Molecules, The 8th international conference on muon spin resonance, Les Diableres, Switzerland, 1999 (presented by Zaher Salman).
  17. First order quantum-classical transition of the escape rate in the high spin molecule CrNi6: a mSR study, EPS Grenoble, France, 1998.
  18. Muon Spin Relaxation Measurements in Kagomé Lattice System SrCr8Ga4O19,mSR-93-Maui, Maui Hawaii, 1994.

Refereed Papers in Conference proceedings

  1. O. Ofer, A. Keren, C. Baines and J. S. Gardner, Lack of static lattice distortion in Tb2Ti2O7, accepted to J. Phys.: Cond. Mat. 19, 145270 (2007).
  2. Z. Salman, A. Keren, S. Megeawa, M. Ueda, O. Shafir, B. Barbara, C. Baines, Probing magnetic quantum tunneling in Fe8 with muons, Physica B 326, 480-483 (2003).
  3. Z. Salman, A. Keren, P. Mendels, A. Scuiller, and M. Verdaguer, Quantum fluctuations of the magnetization in high spin molecules – a mSR study, Physica B 289-290, 106-109 (2000).
  4. A. Keren, G. Bazalitsky, P. Mendels, I. Campbell and J. Lord, Magnetic field-time scaling relations and exotic spin correlations: a mSR study of spin-glasses, Physica B 289-290, 202-204 (2000).
  5. A. Keren and G. Bazalitsky, Muon polarization in the presence of exotic spin correlations, Physica B 289-290, 205-208 (2000).
  6. I. Mirebeau, M. Hennion, M. J. P. Gingras, A. Keren, K. Kojima, M. Lankin, G. M. Luke, B. Nachumi, W. D. Wu, Y. J. Uemnra, I. A. Campbell, and G. D. Morris, Depolarization in reentrant spin glasses: A comporison between neutron and muon probels, Hyp. Int. 105, 343-348 (1997).
  7. A. Keren, K. Kojima, L. P. Le, G. L. Luke, W. D. Wu, Y. J. Uemura, S. Tajima and S. Uchida, Muon-Spin-Rotation Measurements in the “Infinite-Chain” Ca2CuO3, JMMM 140-144, 1641-1642 (1995).
  8. A. Keren, Simulation of spin dynamics on kagomé and square lattices, JMMM 140-144, 1493-1494 (1995).
  9. W. D. Wu, A. Keren, L. P. Le, G. L. Luke, B. J. Sternlieb, Y. J. Uemura, D. C. Johnston, B. K. Cho, and P.Gehring, Magneticc Penetration Depth in V3Si and 2O4 Measured bmSR, Hyp. Int. 86, 615-621 (1994).
  10. W. D. Wu, A. Keren, L. P. Le, G. L. Luke, B. J. Sternlieb, Y. J. Uemura, N. Sato, T. Komatsubara, and G. P. Meisner, mSR Studies in the Heavy Fermion Systems UNi2Al3, UPd2Al3, and U2PtC2, Hyp. Int. 85, 425-430 (1994).
  11. G. L. Luke, A. Keren, L. P. Le, Y. J. Uemura, W. D. Wu, D. Bonn, L. Taillefer, J. D. Garrett, Y. Onuki, Muon Spin Relaxation in Heavy Fermion Systems, Hyp. Int. 85, 397-409 (1994).
  12. A. Keren, L. P. Le, G. L. Luke, W. D. Wu, and Y. J. Uemura, Explaining m+ Spin-Lattice Relaxation in MnF2, below TN, By Scattering Function, Hyp. Int. 85, 363-368 (1994).
  13. L. P. Le. A. Keren, G. L. Luke, W. D. Wu, Y. J. Uemura, W. S. Jenks, and R. Breslow, mSR Studies in an I2-doped Phenylene-Diamine Polymer, Hyp. Int. 85, 287-292 (1994).
  14. A. Keren, Dynamic Spin Relaxation Processes of m+ in an Antiferromagnet, Hyp. Int. 85, 281-286 (1994).
  15. A. Keren, L. P. Le, G. L. Luke, W. D. Wu, Y. J. Uemura, Y. Ajiro, T. Asano, H. Kuriyama, M. Mekata and H.Kiruchi, Muon Spin Relaxation Measurements in Kagomé Lattice System SrCr8Ga4O19, Hyp. Int. 85, 181-186 (1994).
  16. Y. J. Uemura, A. Keren, L. P. Le, G. L. Luke, and W. D. Wu, mSR Studies in Frustrated and/or Low-Dimensional Spin Systems, Hyp. Int. 85, 133-144 (1994).
  17. Mekata, N. Yaduchi, H. Kuriyama, T. Asano, K. Nagamine, A. Keren, L. P. Lr, G. M. Luke, W. D. Wu and Y. J. Uemura, mAR Study of Two-Dimentional Antiferromagnets, Delaf Type Compounds, Hyp. Int. 78, 423-427 (1993).

Participation in organizing conferences

  1. 12th Internation conference on muon spin resonance, Cancun Maxico, 2011.
  2. Highly Frustrated Magnets, Dresden Germany, 2010.
  3. Muon spin spectroscopy, KEK, Japan 2008.
  4. Highly Frustrated Magnets, Braunschweig, Germany 2008.
  5. Highly Frustrated Magnets, LaLond, France 2005.
  6. International Conference on Muon Spin Spectroscopy, Oxford, U.K. 2005.
  7. Israel Physical society meeting, Technion, May-11 2000, organizing the magnetism and superconductivity session.

Compuscripts

arXiv