The concept of topological energy bands and their manifestations have been demonstrated
in condensed matter systems as a fantastic paradigm toward unprecedented physical …

Abstract The PyProcar Python package plots the band structure and the Fermi surface as a
function of site and/or s, p, d, f-projected wavefunctions obtained for each k-point in the …

Carbon has numerous one-dimensional (1D), two-dimensional (2D), and three-dimensional
(3D) allotropic structures. The study of carbon materials has long been a major focus of …

The discovery of topological quantum states marks a new chapter in both condensed matter
physics and materials sciences. By analogy to spin electronic system, topological concepts …

Weyl points are often believed to appear in pairs with opposite chirality. In this work, we
show by first-principles calculations and symmetry analysis that single Weyl phonons with …

By using symmetry analysis and first-principles calculations, we propose that the simple
cubic structure of copper chloride (CuCl) in high-pressure phase can be worked as a three …

Based on the dimension of degeneracy, topological electronic systems can roughly be
divided into three parts: nodal point, line, and surface materials corresponding to zero-, one …

Acoustic phonon is a classic example of triple degeneracy point in band structure. This triple
point always appears in phonon spectrum because of the Nambu–Goldstone theorem. Here …

Weyl materials exhibiting topologically nontrivial touching points in band dispersion pave
the way to exotic transport phenomena and novel electronic devices. Here, we demonstrate …

Triple nodal points are degeneracies of energy bands in momentum space at which three
Hamiltonian eigenstates coalesce at a single eigenenergy. For spinless particles, the …