Studies of non-trivial band topology and electron-hole compensation in YSb
Abstract
In this article, we study non-trivial topological phase and electron-hole compensation in extremely large magnetoresistance (XMR) material YSb under hydrostatic pressure using first-principles 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 non-trivial topological phase appears without perfect electron-hole compensation. The results indicate that the non-trivial 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