Weyl and Dirac semimetals are three-dimensional phases of matter with gapless electronic
excitations that are protected by topology and symmetry. As three-dimensional analogs of …

The physics of quantum materials is dictated by many-body interactions and mathematical
concepts such as symmetry and topology that have transformed our understanding of matter …

The topology of the electronic structure of a crystal is manifested in its surface states.
Recently, a distinct topological state has been proposed in metals or semimetals whose spin …

Three-dimensional topological insulators are fascinating materials with insulating bulk yet
metallic surfaces that host highly mobile charge carriers with locked spin and momentum …

Angle resolved photoemission spectroscopy (ARPES) is commonly known as a powerful
probe of the one-electron removal spectral function in ordered solid state. With increasing …

Superconductivity involving topological Dirac electrons has recently been proposed as a
platform between concepts in high-energy and condensed-matter physics. It has been …

Using angle-resolved photoelectron spectroscopy (ARPES), we investigate the surface
electronic structure of the magnetic van der Waals compounds MnBi 4 Te 7 and MnBi 6 Te …

The major breakthroughs in understanding of topological materials over the past decade
were all triggered by the discovery of the Z2-type topological insulator—a type of material …

Unlike string theory, topological physics in lower dimensional condensed matter systems is
an experimental reality since the bulk-boundary correspondence can be probed …

A Weyl semimetal is a new state of matter that hosts Weyl fermions as quasiparticle
excitations. The Weyl fermions at zero energy correspond to points of bulk-band …