Magnetotransport in disordered two-dimensional topological insulators: signatures of charge puddles

Abstract

In this numerical study we investigate the influence and interplay of disorder, spin-orbit coupling and magnetic field on the edge-transport in HgTe/CdTe quantum wells in the framework of coherent elastic scattering. We show that the edge states remain unaffected by the combined effect of moderate disorder and a weak magnetic field at realistic spin-orbit coupling strengths. Agreement with the experimentally observed linear magnetic field dependence for the conductance of long samples is obtained when considering the existence of charge puddles.

17 pages, 6 figures

References in corpus (16)

• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Nonlocal edge state transport in the quantum spin Hall state
• The Quantum Spin Hall Effect: Theory and Experiment
• Topological Anderson Insulator
• Resistance of helical edges formed in a semiconductor heterostructure
• Spatially resolved study of backscattering in the quantum spin Hall state
• The fate of topological-insulator surface states under strong disorder
• Three-dimensional phase diagram of disordered HgTe/CdTe Quantum spin-Hall wells
• Magnetic properties of HgTe quantum wells
• Magnetic field induced localization in 2D topological insulators
• Linear magnetoresistance in HgTe quantum wells
• Disorder and magnetic-field induced breakdown of helical edge conduction in an inverted electron-hole bilayer
• The noncommutative Kubo Formula: Applications to Transport in Disordered Topological Insulators with and without Magnetic Fields
• Aharonov Bohm effect in 2D topological insulator
• Using Topological Insulator Proximity to Generate Perfectly Conducting Channels in Materials without Topological Protection

Cited by in corpus (11)

• Observation of the Quantum Spin Hall Effect up to 100 Kelvin in a Monolayer Crystal
• Photogalvanic probing of helical edge channels in 2D HgTe topological insulators
• Laser-beam patterned topological insulating states on thin semiconducting MoS2
• Low-Temperature Conductivity of Weakly Interacting Quantum Spin Hall Edges in Strained-Layer InAs/GaInSb
• Room-temperature quantum spin Hall phase in laser-patterned few-layer 1T'- MoS2
• Two-dimensional topological insulator edge state backscattering by dephasing
• Probing edge state conductance in ultra-thin topological insulator films
• Conductance oscillations in quantum point contacts of InAs/GaSb heterostructures
• Tunable spin-polarized edge transport in inverted quantum-well junctions
• Two dimensional topological insulator in quantizing magnetic fields
• Exploring Topological Transport in Pt${}_2$HgSe${}_3$ Nanoribbons: Insights for Spintronic Device Integration