Time-reversal symmetry (TRS) is pivotal for materials' optical, magnetic, topological, and
transport properties. Chiral phonons, characterized by atoms rotating unidirectionally around …

Under the Born-Oppenheimer approximation, the electronic ground state evolves
adiabatically and can accumulate geometrical phases characterized by the molecular Berry …

In this paper, we theoretically show that in a helical crystal, a current is induced by chiral
phonons representing the microscopic local rotation of atoms. By treating the rotational …

Solid state compounds exhibiting multiple and coupled macroscopic orders, named
multiferroics, represent a challenge for both theoretical and experimental modern …

Electrons in two-dimensional (2D) Dirac materials carry local band geometric quantities,
such as the Berry curvature and orbital magnetic moments, which, combined with electron …

Circular phonon dichroism effect has been proposed in two-dimensional materials; however,
the lack of tunability hinders the exploration of the effect. Here, we investigate the role of …

We group materials into five symmetry classes and determine in which of these classes
phonons carry angular momentum in the Brillouin zone, away from a high-symmetry point …

A magnetic field can generally induce circular phonon dichroism based on the formation of
Landau levels of electrons. Here, we study the magnetization-induced circular phonon …

Topological materials are often associated with exceptional thermoelectric properties.
Orthorhombic Ba Mn Sb 2 is a topological semimetal consisting of alternating layers of Ba …

Recently, it has been predicted that the Berry curvature of electrons can produce an angular
momentum for phonons. In systems with time-reversal symmetry, the direction of the phonon …