Helical Quantum States in HgTe Quantum Dots with Inverted Band Structures

Abstract

We investigate theoretically the electron states in HgTe quantum dots (QDs) with inverted band structures. In sharp contrast to conventional semiconductor quantum dots, the quantum states in the gap of HgTe quantum dot with an inverted band structure are fully spin-polarized, and show ring-like density distributions near the boundary of the QD and spin-angular momentum locking. The persistent charge currents and magnetic moments, i.e., the Aharonov-Bohm effect, can be observed in such QD structure and oscillate with increasing magnetic fields. This feature offers us a practical way to detect these exotic ring-like edge states using the SQUID technique.

5 pages, 4 figures

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Cited by in corpus (27)

• Spin-helical transport in normal and superconducting topological insulators
• Anomalous Electron Trajectory in Topological Insulators
• Hyperfine interactions in two-dimensional HgTe topological insulators
• Generating and controlling spin-polarized currents induced by a quantum spin Hall antidot
• Persistent currents in a graphene ring with armchair edges
• Quantum Hall Edge States in Topological Insulator Nanoribbons
• Current-induced gap opening in interacting topological insulator surfaces
• Orbital Magnetization of Quantum Spin Hall Insulator Nanoparticles
• Aharonov Bohm effect in 2D topological insulator
• Effects of Defects and Dephasing on Charge and Spin Currents in Two-Dimensional Topological Insulators
• Blurring the boundaries between topological and non-topological phenomena in dots
• Equal-Spin Andreev Reflection in Junctions of Spin-Resolved Quantum Hall Bulk State and Spin-Singlet Superconductor
• Controlling the Flow of Spin and Charge in Nanoscopic Topological Insulators
• Enhanced circular photogalvanic effect in HgTe quantum wells in the heavily inverted regime
• Low-energy electronic properties of Weyl semimetal quantum dot
• In-surface confinement of topological insulator nanowire surface states
• Single-Electron Transistor Made of a 3D Topological Insulator Nanoplate
• Topological insulator ring with magnetic impurities
• Two-dimensional topological insulators in quantizing magnetic fields
• Influence of bulk inversion asymmetry on the magneto-optical spectrum of a HgTe topological insulator
• Engineering Topological quantum dot through planar magnetization in bismuthene
• Electrically controlled crossing of energy levels in quantum dots in two-dimensional topological insulators
• Electron transport in a ferromagnetic/normal/ferromagnetic tunnel junction based on the surface of a topological insulator
• Tunable chirality and circular dichroism of a topological insulator with $C_{2v}$ symmetry as a function of Rashba and Dresselhaus parameters
• Optical injection of a spin current into a zigzag nanoribbon of monolayer MoS2 with antiferromagnetic Kekule distortion
• Finite-Size Effects in the Dynamic Conductivity and Faraday Effect of Quantum Anomalous Hall Insulators
• The electronic structure of intrinsic magnetic topological insulator MnBi2Te4 quantum wires