Muon-spin relaxation study of the layered kagome superconductor CsV$_3$Sb$_5$
| Autor: | Shan, Zhaoyang, Biswas, Pabitra K., Ghosh, Sudeep K., Tula, T., Hillier, Adrian D., Adroja, Devashibhai, Cottrell, Stephen, Cao, Guang-Han, Liu, Yi, Xu, Xiaofeng, Song, Yu, Yuan, Huiqiu, Smidman, Michael |
|---|---|
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Phys. Rev. Research 4, 033145 (2022) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevResearch.4.033145 |
| Popis: | The ${\mathbb{Z}}_{2}$ topological metals $R$V$_3$Sb$_5$ ($R$ = K, Rb, Cs) with a layered kagome structure provide a unique opportunity to investigate the interplay between charge order, superconductivity and topology. Here, we report muon-spin relaxation/rotation ($\mu$SR) measurements performed on CsV$_3$Sb$_5$ across a broad temperature range, in order to uncover the nature of the charge-density wave order and superconductivity in this material. From zero-field $\mu$SR, we find that spontaneous magnetic fields appear below 50 K which is well below the charge-density wave transition ($T^* \sim 93$ K). We show that these spontaneous fields are dynamic in nature making it difficult to associate them with a hidden static order. The superconducting state of CsV$_3$Sb$_5$ is found to preserve time-reversal symmetry and the transverse-field $\mu$SR results are consistent with a superconducting state that has two fully open gaps. Comment: 8 pages, 6 figures |
| Databáze: | arXiv |
| Externí odkaz: |
|