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Electron-Electron Interactions in 2D Semiconductor InSe

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arxiv 2004.10879 v1 pith:VIKVNUL2 submitted 2020-04-22 cond-mat.mes-hall cond-mat.dis-nncond-mat.mtrl-scicond-mat.str-el

Electron-Electron Interactions in 2D Semiconductor InSe

classification cond-mat.mes-hall cond-mat.dis-nncond-mat.mtrl-scicond-mat.str-el
keywords eeiselectron-electronfermiinseinteractionsliquidnegativeparabolic
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Electron-electron interactions (EEIs) in 2D van der Waals structures is one of the topics with high current interest in physics. We report the observation of a negative parabolic magnetoresistance (MR) in multilayer 2D semiconductor InSe beyond the low-field weak localization/antilocalization regime, and provide evidence for the EEI origin of this MR behavior. Further, we analyze this negative parabolic MR and other observed quantum transport signatures of EEIs (temperature dependent conductance and Hall coefficient) within the framework of Fermi liquid theory and extract the gate voltage tunable Fermi liquid parameter $F_0^\sigma$ which quantifies the electron spin-exchange interaction strength.

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