拓扑半金属PdTe中的多能隙无节点超导性
超导电性
2023-10-13 v1
摘要
近来PdTe被认定为自旋轨道耦合的拓扑Dirac半金属，并声称呈现体节点与表面无节点的超导能隙。本文报道了在T_c=4.5 K的PdTe单晶上的极低温热导率测量，以研究其超导能隙结构。发现零磁场下残余线性项κ_0/T可忽略。此外，κ_0(H)/T的磁场依赖呈现S形曲线。这些结果表明PdTe具有多个无节点超导能隙，这与所声称的体节点能隙相矛盾。差异的原因可能是先前的角分辨光电子能谱测量仅进行至2 K，无法观测到较小的无节点能隙。PdTe中的全带隙超导态与其作为拓扑超导体候选者相兼容。
引用
@article{arxiv.2310.08462,
title = {Multigap nodeless superconductivity in the topological semimetal PdTe},
author = {Chengcheng Zhao and Xiangqi Liu and Jinjin Wang and Chunqiang Xu and Baomin Wang and Wei Xia and Zhenhai Yu and Xiaobo Jin and Xu Zhang and Jing Wang and Dongzhe Dai and Chengpeng Tu and Jiaying Nie and Hanru Wang and Yihan Jiao and Daniel Duong and Silu Huang and Rongying Jin and Zhu'an Xu and Yanfeng Guo and Xiaofeng Xu and Shiyan Li},
journal= {arXiv preprint arXiv:2310.08462},
year = {2023}
}