Superconducting Fluctuations in Overdoped Bi2Sr2CaCu2O8+δ

被引：43

作者：

He, Yu ^{[1
,2
,3
,4
]}

Chen, Su-Di ^{[1
,3
]}

Li, Zi-Xiang ^{[2
]}

Zhao, Dan ^{[5
,6
]}

Song, Dongjoon ^{[7
]}

Yoshida, Yoshiyuki ^{[7
]}

Eisaki, Hiroshi ^{[7
]}

Wu, Tao ^{[5
,6
]}

Chen, Xian-Hui ^{[5
,6
]}

Lu, Dong-Hui ^{[8
]}

Meingast, Christoph ^{[9
]}

Devereaux, Thomas P. ^{[3
,10
]}

Birgeneau, Robert J. ^{[2
,4
]}

Hashimoto, Makoto ^{[8
]}

Lee, Dung-Hai ^{[2
,4
]}

Shen, Zhi-Xun ^{[1
,3
]}

机构：

[1] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

[2] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[3] SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA

[4] Lawrence Berkeley Natl Lab, Mat Sci Div, Berkeley, CA 94720 USA

[5] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[6] Univ Sci & Technol China, Dept Phys, CAS Key Lab Strongly Coupled Quantum Matter Phys, Hefei 230026, Anhui, Peoples R China

[7] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058565, Japan

[8] SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA

[9] Karlsruhe Inst Technol, Inst Quantum Mat & Technol, D-76021 Karlsruhe, Germany

[10] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

来源：

PHYSICAL REVIEW X | 2021年 / 11卷 / 03期

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

FERMI-SURFACE; PHASE-TRANSITIONS; PSEUDOGAP STATE; PAIR FORMATION; SUPERFLUID; TEMPERATURE; DENSITY; HEAT; TC;

D O I：

10.1103/PhysRevX.11.031068

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 Bi2Sr2CaCu2O8+delta (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 (pi, 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.

引用

页数：9

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