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Prof. Amit Keren's Group Technion

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Research Activity

HT2

High Tc Superconductivity

Common energy scale for magnetism and superconductivity in the cuprates One of the most challenging tasks of solid-state physics today is to understand the mechanism for superconductivity in cuprates. These materials, which have a relatively high critical temperature Tc, are based on doped CuO2 planes. Since at zero doping they are antiferromagnets, several theories ascribe…

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Quantum Tunneling of the Magnetization

High spin molecules (HSM) are molecules consisting of ions coupled by ferromagnetic or antiferromagnetic interaction; these molecules crystallize in a lattice where neighboring molecules are very well separated, yielding at low temperatures (temperatures lower than the magnetic interaction between ions) molecules that behave like noninteracting giant spins. These molecules have a magneto-crystalline anisotropy, and the…

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Frustrated Magnets

This research project is funded by the United States Israel Binational Science Foundation. The project name is Degenerate Magnets: A Study by Local Probes, and it duration is 1998-2001. The principal investigators are: A. Keren (Technion), Y. J. Uemura and G. M. Luke (Columbia Univ.). We have published the following papers on the subject: O.Ofer,…

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Spin Glasses

Our major finding is:Mapping exotic spin correlations by field dependent muon spin-lattice relaxation measurements.Traditionally, the spin lattice relaxation time of a muon in a magnetic environment, also known as T1, is interpreted using the concept of spin correlation time. However, in some situations, no correlation time could be assigned to the spins, and a different interpretation of T1 is required. Our group…

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