Intrinsic electronic structure and nodeless superconducting gap of YBa2Cu3O7-δ observed by spatially-resolved laser-based angle resolved photoemission spectroscopy

doi:10.1088/1674-1056/acf498

中国物理B ›› 2023, Vol. 32 ›› Issue (11): 117401-117401.doi: 10.1088/1674-1056/acf498

Intrinsic electronic structure and nodeless superconducting gap of YBa₂Cu₃O_7-δ observed by spatially-resolved laser-based angle resolved photoemission spectroscopy

Shuaishuai Li(李帅帅)^1,2, Taimin Miao(苗泰民)^1,2, Chaohui Yin(殷超辉)^1,2, Yinghao Li(李颖昊)^1,2, Hongtao Yan(闫宏涛)^1,2, Yiwen Chen(陈逸雯)^1,2, Bo Liang(梁波)^1,2, Hao Chen(陈浩)^1,2, Wenpei Zhu(朱文培)^1,2, Shenjin Zhang(张申金)³, Zhimin Wang(王志敏)³, Fengfeng Zhang(张丰丰)³, Feng Yang(杨峰)³, Qinjun Peng(彭钦军)³, Chengtian Lin(林成天)⁴, Hanqing Mao(毛寒青)^1,2,5, Guodong Liu(刘国东)^1,2,5, Zuyan Xu(许祖彦)³, Lin Zhao(赵林)^1,2,5, and X J Zhou(周兴江)^1,2,5,†

1 National Laboratory for Superconductivity, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
4 Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany;
5 Songshan Lake Materials Laboratory, Dongguan 523808, China

收稿日期:2023-08-24 接受日期:2023-08-29 出版日期:2023-10-16 发布日期:2023-11-03
通讯作者: X J Zhou E-mail:XJZhou@iphy.ac.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11888101 and 11974404), the National Key Research and Development Program of China (Grant Nos. 2021YFA1401800 and 2018YFA0704200), the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (Grant Nos. XDB25000000 and XDB33000000), the Youth Innovation Promotion Association of CAS (Grant No. Y2021006), Innovation Program for Quantum Science and Technology (Grant No. 2021ZD0301800) and the Synergetic Extreme Condition User Facility (SECUF).

Intrinsic electronic structure and nodeless superconducting gap of YBa₂Cu₃O_7-δ observed by spatially-resolved laser-based angle resolved photoemission spectroscopy

1 National Laboratory for Superconductivity, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
4 Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany;
5 Songshan Lake Materials Laboratory, Dongguan 523808, China

Received:2023-08-24 Accepted:2023-08-29 Online:2023-10-16 Published:2023-11-03
Contact: X J Zhou E-mail:XJZhou@iphy.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11888101 and 11974404), the National Key Research and Development Program of China (Grant Nos. 2021YFA1401800 and 2018YFA0704200), the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (Grant Nos. XDB25000000 and XDB33000000), the Youth Innovation Promotion Association of CAS (Grant No. Y2021006), Innovation Program for Quantum Science and Technology (Grant No. 2021ZD0301800) and the Synergetic Extreme Condition User Facility (SECUF).

1. 2023-117401-SI.pdf(431KB)

摘要/Abstract

摘要： The spatially-resolved laser-based high-resolution angle resolved photoemission spectroscopy (ARPES) measurements have been performed on the optimally-doped YBa₂Cu₃O_7-δ (Y123) superconductor. For the first time, we found the region from the cleaved surface that reveals clear bulk electronic properties. The intrinsic Fermi surface and band structures of Y123 were observed. The Fermi surface-dependent and momentum-dependent superconducting gap was determined which is nodeless and consistent with the d+is gap form.

关键词: YBCO, angle resolved photoemission spectroscopy, electronic structure, superconducting gap

Abstract: The spatially-resolved laser-based high-resolution angle resolved photoemission spectroscopy (ARPES) measurements have been performed on the optimally-doped YBa₂Cu₃O_7-δ (Y123) superconductor. For the first time, we found the region from the cleaved surface that reveals clear bulk electronic properties. The intrinsic Fermi surface and band structures of Y123 were observed. The Fermi surface-dependent and momentum-dependent superconducting gap was determined which is nodeless and consistent with the d+is gap form.

Key words: YBCO, angle resolved photoemission spectroscopy, electronic structure, superconducting gap

中图分类号: (Electronic structure (photoemission, etc.))

74.25.Jb

74.72.-h (Cuprate superconductors) 74.72.Gh (Hole-doped) 74.20.Rp (Pairing symmetries (other than s-wave))

Shuaishuai Li(李帅帅), Taimin Miao(苗泰民), Chaohui Yin(殷超辉), Yinghao Li(李颖昊), Hongtao Yan(闫宏涛), Yiwen Chen(陈逸雯), Bo Liang(梁波), Hao Chen(陈浩), Wenpei Zhu(朱文培), Shenjin Zhang(张申金), Zhimin Wang(王志敏), Fengfeng Zhang(张丰丰), Feng Yang(杨峰), Qinjun Peng(彭钦军), Chengtian Lin(林成天), Hanqing Mao(毛寒青), Guodong Liu(刘国东), Zuyan Xu(许祖彦), Lin Zhao(赵林), and X J Zhou(周兴江). Intrinsic electronic structure and nodeless superconducting gap of YBa₂Cu₃O_7-δ observed by spatially-resolved laser-based angle resolved photoemission spectroscopy[J]. 中国物理B, 2023, 32(11): 117401-117401.

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Intrinsic electronic structure and nodeless superconducting gap of YBa₂Cu₃O_7-δ observed by spatially-resolved laser-based angle resolved photoemission spectroscopy

Intrinsic electronic structure and nodeless superconducting gap of YBa₂Cu₃O_7-δ observed by spatially-resolved laser-based angle resolved photoemission spectroscopy

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