One-dimensional helical liquids can appear at boundaries of certain condensed matter
systems. Two prime examples are the edge of a quantum spin Hall insulator and the hinge …

The electrons in the edge channels of two-dimensional topological insulators can be
described as a helical Tomonaga-Luttinger liquid. They couple to nuclear spins embedded …

We have investigated the time-resolved low-energy charge dynamics in counterpropagating
edge channels formed in the quantum Hall regime of an electron-hole bilayer system in …

The search for room temperature quantum spin Hall insulators (QSHIs) based on widely
available materials and a controlled manufacturing process is one of the major challenges of …

First-principles simulations are conducted to shed light on the question of whether a two-
dimensional topological insulator (2DTI) phase may be obtained at the interface between …

Strong electron–electron interactions between adjacent nanoscale wires can lead to one-
dimensional Coulomb drag, where current in one wire induces a voltage in the second wire …

We report on temperature-dependent terahertz spectroscopy of a three-layer
InAs/GaSb/InAs quantum well (QW) with inverted-band structure. The interband optical …

We study the interplay between a uniaxial strain and the topology of the Haldane and the
modified Haldane models which, respectively, exhibit chiral and antichiral edge modes. The …

We report transport measurements of strained InAs/In x Ga 1− x Sb composite quantum
wells (CQWs) in the quantum spin Hall phase, focusing on the control of the energy gap …

High-frequency transport in the edge states of the quantum spin Hall (QSH) effect has rarely
been explored, though it could cast light on the scattering mechanisms taking place therein …