Symmetries and weak localization and antilocalization of Dirac fermions in HgTe 
quantum wells

Ostrovsky, P. M.; Gornyi, I. V.; Mirlin, A. D.

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Symmetries and weak localization and antilocalization of Dirac fermions in HgTe quantum wells

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Ostrovsky, P. M.
Max Planck Society;

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Ostrovsky, P. M., Gornyi, I. V., & Mirlin, A. D. (2012). Symmetries and weak localization and antilocalization of Dirac fermions in HgTe quantum wells. Physical Review B, 86(12): 125323.

Cite as: https://hdl.handle.net/21.11116/0000-000E-C286-F

Abstract

We perform a symmetry analysis of a 2D electron system in HgTe/HgCdTe quantum wells in the situation when the chemical potential is outside of the gap, so the bulk of the quantum well is conducting. In order to investigate quantum transport properties of the system, we explore symmetries of the low-energy Hamiltonian, which is expressed in terms of two flavors of Dirac fermions, and physically important symmetry-breaking mechanisms. This allows us to predict emerging patterns of symmetry breaking that control the weak localization and antilocalization showing up in transverse-field magnetoresistance.