Abstract
Contrary to previous two-band model studies which find increasing temperature would induce a topological phase transition, we show here through first-principles calculations that the opposite is also realizable, depending on the material’s full band structure and symmetry of the electron-phonon coupling potential. This finding explains recent experimental results by Wojek et al. [Nat. Commun. 6, 8463 (2015)]. We show that the topological phase diagram of as a function of doping and temperature contains two distinct regions with nontrivial topology. In , the phonons promote the topological phase at high temperature, while in , the system is driven back into the trivial phase.
- Received 1 August 2016
DOI:https://doi.org/10.1103/PhysRevLett.117.246401
© 2016 American Physical Society