| Autor: |
Yueshen Wu, Qi Wang, Xiang Zhou, Jinghui Wang, Peng Dong, Jiadian He, Yifan Ding, Bolun Teng, Yiwen Zhang, Yifei Li, Chenglong Zhao, Hongti Zhang, Jianpeng Liu, Yanpeng Qi, Kenji Watanabe, Takashi Taniguchi, Jun Li |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
npj Quantum Materials, Vol 7, Iss 1, Pp 1-8 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2397-4648 |
| DOI: |
10.1038/s41535-022-00516-9 |
| Popis: |
Abstract Nonreciprocal charge transport phenomena are widely studied in two-dimensional superconductors, which demonstrate unidirectional-anisotropy magnetoresistances as a result of symmetry breaking. Here, we report a strong nonreciprocal transport phenomenon in superconducting CsV3Sb5 thin flakes. The second harmonic voltages, mainly originating from the rectification effect of vortex motion, are unambiguously developed with in-plane and out-of-plane magnetic fields, and their magnitudes are comparable to those in noncentrosymmetric superconductors. The second harmonic magnetoresistances split into several peaks and some of them reverse their signs by ramping the magnetic field or the current within the superconducting transition. The nonreciprocity suggests a strong asymmetry in CsV3Sb5. The centrosymmetric structure and symmetric electronic phases in CsV3Sb5 can hardly induce the distinct nonreciprocal transport phenomenon, which could be correlated to a symmetry breaking from an unconventional superconducting order parameter symmetry. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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