Temperature dependence of the energy band gap in ZrTe$_5$: implications for the topological phase

Autor:	Mohelsky, I., Wyzula, J., Piot, B. A., Gu, G. D., Li, Q., Akrap, A., Orlita, M.
Rok vydání:	2022
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.107.L041202
Popis:	Using Landau level spectroscopy, we determine the temperature dependence of the energy band gap in zirconium pentatelluride (ZrTe$_5$). We find that the band gap reaches $E_g=(5 \pm 1)$ meV at low temperatures and increases monotonously when the temperature is raised. This implies that ZrTe$_5$ is a weak topological insulator, with non-inverted ordering of electronic bands in the center of the Brillouin zone. Our magneto-transport experiments performed in parallel show that the resistivity anomaly in ZrTe$_5$ is not connected with the temperature dependence of the band gap. Comment: 6 pages, 2 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2211.14597 Zobrazit plný text záznamu View this record from Arxiv