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 …

The first-principles band theory paradigm has been a key player not only in the process of
discovering new classes of topologically interesting materials, but also for identifying salient …

The discovery of the quantum spin Hall effect and topological insulators more than a decade
ago has revolutionized modern condensed matter physics. Today, the field of topological …

Topological states of quantum matter have been investigated intensively in recent years in
materials science and condensed matter physics. The field developed explosively largely …

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 present transport and scanning SQUID measurements on InAs/GaSb double quantum
wells, a system predicted to be a two-dimensional topological insulator. Top and back gates …

The interplay between bulk spin-orbit coupling and electron-electron interactions produces
umklapp scattering in the helical edge states of a two-dimensional topological insulator. If …

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 …

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 …

Among the theoretically predicted two-dimensional topological insulators, InAs/GaSb double
quantum wells (DQWs) have a unique double-layered structure with electron and hole …