The topological properties of an object, associated with an integer called the topological
invariant, are global features that cannot change continuously but only through abrupt …

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 …

Quantum spin Hall devices with edges much longer than several microns do not display
ballistic transport; that is, their measured conductances are much less than e 2/h per edge …

We investigate the influence of nuclear spins on the resistance of helical edge states of two-
dimensional topological insulators (2DTIs). Via the hyperfine interaction, nuclear spins allow …

We consider chiral electrons moving along the one-dimensional helical edge of a two-
dimensional topological insulator and interacting with a disordered chain of Kondo …

A quantum spin Hall insulator is a two-dimensional state of matter consisting of an insulating
bulk and one-dimensional helical edge states. While these edge states are topologically …

We study the phase diagram of the inverted InAs/GaSb bilayer quantum wells. For a small
tunneling amplitude between the layers, we find that the system is prone to the formation of …

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 …

Helical liquids, formed by time-reversal pairs of interacting electrons in topological edge
channels, provide a platform for stabilizing topological superconductivity upon introducing …

We show how a quantum dot with a ballistic single-channel point contact to a
superconductor can be created by means of a gate electrode at the edge of a quantum spin …