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

I. Mohelsky, J. Wyzula, B. A. Piot +4

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 \p…