论文标题
通过Magneto-Infrade Spectroscopicy揭示了dirac band $ _5 $的温度演变
Revealing temperature evolution of the Dirac band in ZrTe$_5$ via magneto-infrared spectroscopy
论文作者
论文摘要
我们使用Magneto-Infrade Spectroscopicy报告了半导体的五角硫酸氢锆（Zrte $ _5 $）中狄拉克带的温度演变。我们发现，在低温下，带隙独立于温度，并且在升高温度下随温度而增加。尽管这样的观察结果似乎在所有温度下都支持较弱的拓扑绝缘体阶段，并在ZRTE $ _5 $中的中间温度下以前报道的拓扑相变（TPT）违背了拓扑相变（TPT），但我们表明，也可以通过考虑强烈的拓扑层学绝缘体相位来考虑传导接触率频带混合和频段反转的效果来解释观察结果。我们的工作提供了整个TPT的频带隙演变的替代图。
We report the temperature evolution of the Dirac band in semiconducting zirconium pentatelluride (ZrTe$_5$) using magneto-infrared spectroscopy. We find that the band gap is temperature independent at low temperatures and increases with temperature at elevated temperatures. Although such an observation seems to support a weak topological insulator phase at all temperatures and defy the previously reported topological phase transition (TPT) at an intermediate temperature in ZrTe$_5$, we show that it is also possible to explain the observation by considering the effect of conduction-valence band mixing and band inversion with a strong topological insulator phase at low temperatures. Our work provides an alternative picture of the band gap evolution across TPT.
