Studies of nontrivial band topology and electronhole compensation in YSb
Abstract
In this article, we study nontrivial topological phase and electronhole compensation in extremely large magnetoresistance (XMR) material YSb under hydrostatic pressure using firstprinciples calculations. YSb is topologically trivial at ambient pressure, but undergoes a reentrant topological phase transition under hydrostatic pressure. The reentrant behavior of topological quantum phase is then studied as a function of charge density ratio under pressure. From the detailed investigation of Fermi surfaces, it is found that electron to hole densities ratio increases with pressure, however a nontrivial topological phase appears without perfect electronhole compensation. The results indicate that the nontrivial topological phase under hydrostatic pressure may not have maximal influence on the magnetoresistance, and need further investigations through experiments to determine the exact relationship between topology and XMR effect.
 Publication:

Solid State Communications
 Pub Date:
 November 2020
 DOI:
 10.1016/j.ssc.2020.114022
 Bibcode:
 2020SSCom.32114022W
 Keywords:

 Topological materials;
 Topological phase transition;
 Density functional theory;
 Extremely large magnetoresistance