Optical study of the electronic structure of locally noncentrosymmetric CeRh2As2
Optical study of the electronic structure of locally noncentrosymmetric CeRh2As2
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局部非中心对称CeRh2As2电子结构的光学研究
DOI：
10.1103/physrevb.104.245116
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发表时间：
2021
影响因子：
3.7
通讯作者：
Khim Seunghyun
中科院分区：
文献类型：
--
作者：
Kimura Shin-ichi;Sichelschmidt Jorg;Khim Seunghyun
利用实验电导谱和第一性原理密度泛函理论计算研究了局域反转对称性破缺的重费米子超导体和参考材料的电子结构。低温下的透射谱显示出在的宽峰和在扣除自由载流子的Drude贡献后的尖峰。在DFT计算的计算光谱中很好地再现了峰特征和背景强度，这意味着传统的金属性质。随着温度的降低，两个分别对应于未被占据的Ce和Ce态的中红外吸收峰在0.4eV和0.4eV处强烈发展，这表明导电态和电子态之间的杂化态的出现。我们比较了的中红外峰的温度依赖性与相应的数据从mandin的a型结构，以检查可能的影响，局部反转对称性破缺的电子结构。
The electronic structures of the heavy-fermion superconductorwith local inversion symmetry breaking and the reference materialhave been investigated by using experimental optical conductivityspectra and first-principles density functional theory calculations. The low-temperaturespectra ofrevealed a broad peak atand a sharp peak atafter a subtraction of the Drude contribution of free carriers. The peak features and the background intensity were nicely reproduced in calculatedspectra from DFT calculations, implying a conventional metallic nature. In, two mid-IR peaks atand 0.4 eV corresponding to the unoccupied Ceandstates, respectively, were strongly developed with decreasing temperature, which suggests the emergence of hybridization states between the conduction andelectrons. We compared the temperature dependence of the mid-IR peaks ofwith corresponding data fromandin a-type structure to examine the possible impact of local inversion symmetry breaking on electronic structures.