论文标题
在压力下，II型WEYL半离子WTE $ _2 $的光学电导率
Optical conductivity of the type-II Weyl semimetal WTe$_2$ under pressure
论文作者
论文摘要
Tungsten ditelluride wte $ _2 $是一种II型Weyl半学，具有对外部压力高度敏感的电子特性，如在压力下出现的超导性所证明的那样。在这里，我们研究了在室温下外部压力下的II型WEYL半含量$ _2 $的光电性。随着压力的增加，明显的光谱重量转移从高能到低能带的频带过渡发生，光电导率光谱的轮廓发生了巨大变化，表明电子带结构对外部压力的敏感性很高。此外，对压力依赖性光电导率的详细分析表明，在文献中报告了$ \ sim $ 2和$ \ sim $ 2和$ \ sim $ 4.5〜GPA的异常，在文献中分别报道了电子和结构相变。
Tungsten ditelluride WTe$_2$ is a type-II Weyl semimetal with electronic properties highly sensitive to external pressure, as demonstrated by the superconductivity emerging under pressure. Here, we study the optical conductivity of the type-II Weyl semimetal WTe$_2$ under external pressure at room temperature. With increasing pressure, a pronounced spectral weight transfer occurs from the high-energy to the low-energy interband transitions, with drastic changes in the profile of the optical conductivity spectrum indicating a high sensitivity of the electronic band structure to external pressure. The detailed analysis of the pressure-dependent optical conductivity furthermore reveals anomalies at the pressures $\sim$2 and $\sim$4.5~GPa, where an electronic and a structural phase transition, respectively, were reported in the literature.
