| Autor: |
Yu He, Su-Di Chen, Zi-Xiang Li, Dan Zhao, Dongjoon Song, Yoshiyuki Yoshida, Hiroshi Eisaki, Tao Wu, Xian-Hui Chen, Dong-Hui Lu, Christoph Meingast, Thomas P. Devereaux, Robert J. Birgeneau, Makoto Hashimoto, Dung-Hai Lee, Zhi-Xun Shen |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Physical Review X, Vol 11, Iss 3, p 031068 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
2160-3308 |
| DOI: |
10.1103/PhysRevX.11.031068 |
| Popis: |
Fluctuating superconductivity—vestigial Cooper pairing in the resistive state of a material—is usually associated with low dimensionality, strong disorder, or low carrier density. Here, we report single-particle spectroscopic, thermodynamic and magnetic evidence for persistent superconducting fluctuations in the heavily hole-doped cuprate superconductor Bi_{2}Sr_{2}CaCu_{2}O_{8+δ} (T_{c}=66 K) despite the high carrier density. With a sign-problem-free quantum Monte Carlo calculation, we show how a partially flat band at (π,0) can help enhance superconducting phase fluctuations. Finally, we discuss the implications of an anisotropic band structure on the phase-coherence-limited superconductivity in overdoped cuprates and other superconductors. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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