Superconducting Fluctuations in Overdoped Bi 2 Sr 2 CaCu 2 O 8 δ

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

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Superconducting Fluctuations in Overdoped Bi 2 Sr 2 CaCu 2 O 8 δ

机译：过载BI 2 SR 2 CACU 2 O8δ的超导波动

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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.

机译：在材料的电阻状态下波动的超导 - 痕迹组合器配对 - 通常与低维度，强紊乱或低载体密度相关。这里，尽管载体密度高，我们报告单粒子光谱，用于持续超导波动的持续超导波动的持续超导波动。使用符号问题的量子蒙特？卡罗计算，我们展示了（π，0）的部分平带如何有助于增强超导相波动。最后，我们讨论了各向异性带结构对过掺杂的铜酸盐和其他超导体中相干限制的超导性的影响。

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《Physical Review X》 |2021年第3期|共9页
作者
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;
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中图分类物理学;
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Condensed Matter PhysicsSuperconductivity;

机译：凝聚态物理超导性;

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1. A Reproducible Approach of Preparing High-Quality Overdoped Bi2Sr2CaCu2O8+δ Single Crystals by Oxygen Annealing and Quenching Method [J] . Yu-Xiao Zhang, Lin Zhao, Gen-Da Gu, 中国物理快报：英文版 . 2016,第006期
2. Distinct Superconducting Gap on Two Bilayer-Split Fermi Surface Sheets in Bi2Sr2CaCu2O8+δ Superconductor [J] . Ping Ai, Guo-Dong Liu, Gen-Da Gu, 中国物理快报：英文版 . 2019,第006期
3. Temperature Evolution of Energy Gap and Band Structure in the Superconducting and Pseudogap States of Bi2Sr2CaCu2O8+δ Superconductor Revealed by Laser-Based Angle-Resolved Photoemission Spectroscopy [J] . Xuan Sun, Chuang-Tian Chen, Zu-Yan Xu, 中国物理快报：英文版 . 2018,第001期
4. Mechanisms of the pancake vortex and vortex line movement in the high Tc superconductors Bi2Sr2CaCu2O8+δand La1.93Sr0.07CuO4+δ [J] . WANG WeiXian, ZHOU Fang, TAN Shun, 中国科学:物理学力学天文学（英文版） . 2007,第002期
5. SUPERCONDUCTING FLUCTUATIONS ABOVE T_C IN OVERDOPED BI_2SR_2CACU_2O_(8+δ) [J] . Z. A. Xu, J. Q. Shen, Z. W. Zhu, International Journal of Condensed Matter, Advanced Materials and Superconductivity Research . 2007,第3a4期

机译：交叠的BI_2SR_2CACU_2O_（8 +δ）中T_C上的超导波动
6. Pseudogap opening, superconducting fluctuation and vortex-like excitation above T-c in slightly overdoped Bi2Sr2CaCu2O8+delta [J] . Xu ZA, Shen JQ, Ooi S, Physica, C. Superconductivity and its applications . 2005,第1a4期

机译：在稍微过量掺杂的Bi2Sr2CaCu2O8 +δ中，T-c上方的伪多巴普开放，超导涨落和涡旋状激发
7. Different regions of fluctuation conductivity in unirradiated and alpha-irradiated Bi2Sr2CaCu2O8+delta and (Bi,Pb)(2)Sr2CaCu2O8+delta superconductors [J] . De U., Sanyal D., Majumdar CK., Physica, C. Superconductivity and its applications . 2000,第2期

机译：未经辐照和经阿尔法辐照的Bi2Sr2CaCu2O8 + delta和（Bi，Pb）（2）Sr2CaCu2O8 + delta超导体中的波动电导率的不同区域
8. SIN feature observed in intrinsic Josephson junction characteristics for overdoped Bi_2Sr_2CaCu_2O_(8+δ) [C] . Minoru Suzuki, Ryota Takemura, Masayuki Ohmaki, International Conference on Applied Superconductivity . 2007

机译：Bi_2Sr_2CaCu_2O_（8 +δ）的固有约瑟夫森结特征中观察到SIN特征
9. Quench Protection of Bi2Sr2CaCu2O8+x High Temperature Superconducting Magnets [D] . Davis, Daniel S. 2019

机译：淬火保护Bi2SR2CACU2O8 + X高温超导磁铁
10. The study of electronic nematicity in an overdoped (Bi Pb)2Sr2CuO6+δ superconductor using scanning tunneling spectroscopy [O] . Yuan Zheng, Ying Fei, Kunliang Bu, -1

机译：用扫描隧道光谱研究超掺杂（BiPb）2Sr2CuO6 +δ超导体中的电子向列性
11. Quasiparticle dynamics in overdoped Bi$_{1.4}$Pb$_{0.7}$Sr$_{1.9}$CaCu$_{2}$O$_{8+\delta}$: Coexistence of superconducting gap and pseudogap below $T_{c}$ [O] . Nair, Saritha K., Zou, X. Q., Zhu, Jian-Xin, 2010

机译：过度的准粒子动力学 Bi $ _ {1.4} $ pb $ _ {0.7} $ sr $ _ {1.9} $ CaCu $ _ {2} $ O $ _ {8+ \ delta} $：共存 $ T_ {c} $以下的超导间隙和赝隙
12. Arpes evidence for a quasiparticle liquid in overdoped Bi2Sr2CaCu2O8+delta [R] . Wells, Yusof, Valla, 2001

机译：arpes证明了过量掺杂的Bi2sr2CaCu2O8 +δ中的准粒子液体

Superconducting Fluctuations in Overdoped Bi 2 Sr 2 CaCu 2 O 8 δ

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