Carrier Injection and Manipulation of Charge-Density Wave in Kagome Superconductor CsV3Sb5
| Autor: | Nakayama, Kosuke, Li, Yongkai, Kato, Takemi, Liu, Min, Wang, Zhiwei, Takahashi, Takashi, Yao, Yugui, Sato, Takafumi |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Phys. Rev. X 12, 011001 (2022) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevX.12.011001 |
| Popis: | Kagome metals AV3Sb5 (A = K, Rb, and Cs) exhibit a unique superconducting ground state coexisting with charge-density wave (CDW), whereas how these characteristics are affected by carrier doping remains unexplored because of the lack of an efficient carrier-doping method. Here we report successful electron doping to CsV3Sb5 by Cs dosing, as visualized by angle-resolved photoemission spectroscopy. We found that the electron doping with Cs dosing proceeds in an orbital-selective way, as characterized by a marked increase in electron filling of the Sb 5pz and V 3dxz/yz bands as opposed to relatively insensitive nature of the V 3dxy/x2-y2 bands. By monitoring the temperature evolution of the CDW gap around the M point, we found that the CDW can be completely killed by Cs dosing while keeping the saddle point with the V 3dxy/x2-y2 character almost pinned at the Fermi level. The present result suggests a crucial role of multi-orbital effect to the occurrence of CDW, and provides an important step toward manipulating the CDW and superconductivity in AV3Sb5. Comment: 7 pages, 3 figures |
| Databáze: | arXiv |
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