{"id":41,"date":"2024-03-14T12:44:22","date_gmt":"2024-03-14T10:44:22","guid":{"rendered":"https:\/\/phsites.technion.ac.il\/schwartz\/?page_id=41"},"modified":"2024-04-10T08:30:54","modified_gmt":"2024-04-10T05:30:54","slug":"research","status":"publish","type":"page","link":"https:\/\/phsites.technion.ac.il\/schwartz\/research\/","title":{"rendered":"Research"},"content":{"rendered":"\n
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Tunable Feshbach resonances in a bilayer semiconductor<\/h2>\n\n\n\n
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Many quantum phases are achieved by controlling the sign and strength of interactions between particles. For example, one of the most common ways to tune the interactions between ultracold atoms, and therefore the many-body phase of the system, is by Feshbach resonances. Feshbach resonances allow tuning of the interaction strength between two particles by bringing their energies to resonance with a bound molecular state. In our work, we have used a two-dimensional bilayer made of MoSe2<\/sub>\/hBN\/MoSe2<\/sub> to demonstrate a Feshbach resonance between an exciton (an electron-hole pair) in one layer and a hole in the other layer. When the optically excited exciton and the hole spatially overlap, and under the application of an appropriate electric field, the hole can tunnel between the two layers and form an interlayer exciton-hole, termed a “Feshbach molecule”. Adjusting the interactions between the exciton and hole using an applied electric field, might well become a versatile tool to study a broad range of two-dimensional many-body phenomena.<\/p>\n<\/div>\n\n\n\n

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Figure 1. (Left) Illustration of a Feshbach resonance between an exciton and a hole. (Right) Schematic of the potential energy of an exciton and a hole in different layers (red, open channel) and the same layer (blue, closed channel)<\/figcaption><\/figure>\n\n\n<\/div>\n<\/div>\n\n\n\n
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Read more:<\/p>\n\n\n\n