Symmetries and weak (anti)localization of Dirac fermions in HgTe quantum wells

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 that 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.

13 pages, 2 figures

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• Interaction and disorder effects in 3D topological insulator thin films
• Aharonov Bohm effect in 2D topological insulator
• One-dimensional weak antilocalization and band Berry phases in HgTe wires
• Interference-induced magnetoresistance in HgTe quantum wells
• Transport in topological insulators with bulk-surface coupling: Interference corrections and conductance fluctuations
• Weak antilocalization in two-dimensional systems with large Rashba splitting
• Weak antilocalization of holes in HgTe quantum wells with a normal energy spectrum
• Quantum interference in HgTe structures
• Anisotropic conductivity and weak localization in HgTe quantum well with normal energy spectrum
• Rashba coupling and spin switching through surface states of Dirac semimetals
• Dual topological insulator with mirror symmetry protected helical edge states