Electronic Transport and quantum oscillation of Topological Semimetals

TL;DR

This review discusses the electronic transport, quantum oscillations, and exotic properties of various topological semimetals, highlighting recent theoretical and experimental advances in understanding their unique relativistic fermions and transport phenomena.

Contribution

It provides a comprehensive overview of band structures, quantum oscillation studies, and transport properties across different topological semimetal phases, offering future perspectives.

Findings

Observation of large magnetoresistance in topological semimetals

Detection of chiral anomaly effects in transport measurements

Identification of exotic quantum oscillation signatures

Abstract

Three-dimensional (3D) topological semimetals represent a new class of topological matters. The study of this family of materials has been at the frontiers of condensed matter physics, and many breakthroughs have been made. Several topological semimetal phases, including Dirac semimetals (DSMs), Weyl semimetals (WSMs), nodal-line semimetals (NLSMs), and triple-point semimetals, have been theoretically predicted and experimentally demonstrated. The low-energy excitation around the Dirac/Weyl nodal points, nodal line, or triply degenerated nodal point can be viewed as emergent relativistic fermions. Experimental studies have shown that relativistic fermions can result in a rich variety of exotic transport properties, e.g., extremely large magnetoresistance, the chiral anomaly, and the intrinsic anomalous Hall effect. In this review, we first briefly introduce band structural characteristics of each topological semimetal phase, then review the current studies on quantum oscillations and exotic transport properties of various topological semimetals, and finally provide a perspective of this area.