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Berry phases in Coulomb drag of double-layer graphene system

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arxiv 2407.08168 v1 pith:45RZ3FWQ submitted 2024-07-11 cond-mat.mes-hall

classification cond-mat.mes-hall
keywords dragcoulombdouble-layergraphenequantumberryeffectsinterference
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Recent experiments suggest quantum interference effects in the Coulomb drag of double-layer graphene systems. By accounting for correlated interlayer impurity scattering under a weak magnetic field, our theoretical results reveal drag resistivities resembling those in weak (anti-)localization. It is established that the quantum interference effect is most significant when the chemical potentials match. The theory clarifies the roles of intra- and interlayer Berry phases in Coulomb drag in double-layer graphene systems and helps delineate the intra- and intervalley contributions. These insights are valuable for designing graphene-based electronic devices exploiting quantum effects.

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  1. Coulomb Drag in Altermagnets

    cond-mat.mes-hall 2024-12 conditional novelty 7.0 of 10

    Coulomb drag in altermagnetic bilayers is predicted to produce Hall drag and spin Hall drag without spin-orbit coupling, with orientation-dependent signatures of altermagnetism.

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