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 …

We propose a tune-free scheme to realize Kramers pairs of Majorana bound states in
recently discovered higher-order topological insulators (HOTIs). We show that, by bringing …

Topological states of matter have attracted a lot of attention due to their many intriguing
transport properties. In particular, two-dimensional topological insulators (2D TI) possess …

Evidence for the quantum spin Hall effect (QSHE) has been reported in several experimental
systems, in the form of edge conductance approaching a quantized value at zero magnetic …

Electrical currents in a quantum spin Hall insulator are confined to the boundary of the
system. The charge carriers behave as massless relativistic particles whose spin and …

We study low-temperature phases and edge-state conductance of an interacting composite
(1+ 1/n) Abelian helical edge state made of a regular helical liquid carrying charge e and a …

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

Despite topological protection and the absence of magnetic impurities, two-dimensional
topological insulators display quantized conductance only in surprisingly short channels …

Helical edge states in quantum spin Hall (QSH) materials are central building blocks of
topological matter design and engineering. Despite their principal topological protection …

Time-reversal symmetry suppresses electron backscattering in a quantum-spin-Hall edge,
yielding quantized conductance at zero temperature. Understanding the dominant …