Probing the Band Topology of Mercury Telluride through Weak Localization and Antilocalization
arXiv:1207.1294 · doi:10.1088/0268-1242/27/12/124006
Abstract
We analyze the effect of weak localization (WL) and weak antilocalization (WAL) in the electronic transport through HgTe/CdTe quantum wells. We show that for increasing Fermi energy the magnetoconductance of a diffusive system with inverted band ordering features a transition from WL to WAL and back, if spin-orbit interactions from bulk and structure inversion asymmetry can be neglected. This, and an additional splitting in the magnetoconductance profile, is a signature of the Berry phase arising for inverted band ordering and not present in heterostructures with conventional ordering. In presence of spin-orbit interaction both band topologies exhibit WAL, which is distinctly energy dependent solely for quantum wells with inverted band ordering. This can be explained by an energy-dependent decomposition of the Hamiltonian into two blocks.
arXiv comment7 pages, 6 figures, added references
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Cited by in corpus (9)
- Quantum interference and Aharonov-Bohm oscillations in topological insulators
- Spin-helical transport in normal and superconducting topological insulators
- Interaction and disorder effects in 3D topological insulator thin films
- One-dimensional weak antilocalization and band Berry phases in HgTe wires
- Interference-induced magnetoresistance in HgTe quantum wells
- Weak antilocalization in two-dimensional systems with large Rashba splitting
- Quantum interference in HgTe structures
- Weak localization and Berry flux in topological crystalline insulators with a quadratic surface spectrum
- Pseudospin Berry phase as a signature of nontrivial band topology in a two-dimensional system