While the topological classification of insulators, semimetals, and superconductors in terms
of nonspatial symmetries is well understood, less is known about topological states …

Topological semimetals exhibit band crossings near the Fermi energy, which are protected
by the nontrivial topological character of the wave functions. In many cases, these …

Topological semimetals have energy bands near the Fermi energy sticking together at
isolated points/lines/planes in the momentum space, which are often accompanied by stable …

The interplay between symmetry and topology in electronic band structures has been one of
the central subjects in condensed-matter physics. Recently, it has been getting clear that a …

We study the superconductivity of spin-polarized electrons in centrosymmetric ferromagnetic
metals. Due to the spin polarization and the Fermi statistics of electrons, the …

While the symmetry-based diagnosis of topological insulators and semimetals has enabled
large-scale discovery of topological materials candidates, the extension of these …

Numerous efforts have been devoted to reveal exotic semimetallic phases with topologically
nontrivial bulk and/or surface states in materials with strong spin-orbit coupling. In particular …

We show that for two-band systems nonsymmorphic symmetries may enforce the existence
of band crossings in the bulk, which realize Fermi surfaces of reduced dimensionality. We …

A large number of half-Heusler compounds have been recently proposed as three-
dimensional (3D) topological insulators (TIs) with tunable physical properties. However, no …

We discuss a topological classification of insulators and superconductors in the presence of
both (nonspatial) discrete symmetries in the Altland-Zirnbauer classification and spatial …