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Electronic structure and superconducting gap of HgBa2Ca2Cu3O8+δ revealed by laser-based angle-resolved photoemission spectroscopy |
| Taimin Miao(苗泰民)1,2,†, Wenshan Hong(洪文山)1,†, Qinghong Wang(汪清泓)1,2,†, Shanshan Zhang(张珊珊)1,2,†, Bo Liang(梁波)1,2, Wenpei Zhu(朱文培)1,2, Neng Cai(蔡能)1,2, Mingkai Xu(徐明楷)1,2, Shenjin Zhang(张申金)3, Fengfeng Zhang(张丰丰)3, Feng Yang(杨峰)3, Zhimin Wang(王志敏)3, Qinjun Peng(彭钦军)3, Zuyan Xu(许祖彦)3, Hanqing Mao(毛寒青)1, Zhihai Zhu(朱志海)1, Xintong Li(李昕彤)1, Guodong Liu(刘国东)1, Lin Zhao(赵林)1, Yuan Li(李源)1, and X. J. Zhou(周兴江)1,2,4,‡ |
1 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 Songshan Lake Materials Laboratory, Dongguan 523808, China |
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Abstract The spatially-resolved laser-based high resolution angle resolved photoemission spectroscopy (ARPES) measurements have been performed on the optimally-doped HgBa$_2$Ca$_2$Cu$_3$O$_{8+\delta}$ (Hg1223) superconductor with a $T_{\rm c}$ of 133 K. Two distinct regions are identified on the cleaved surface: the single Fermi surface region where only one Fermi surface is observed, and the double Fermi surface region where two Fermi surface sheets are resolved coming from both the inner (IP) and outer (OP) CuO$_2$ planes. The electronic structure and superconducting gap are measured on both of these two regions. In both cases, the observed electronic states are mainly concentrated near the nodal region. The momentum dependence of the superconducting gap deviates from the standard d-wave form. These results indicate that the surface electronic structure of Hg1223 behaves more like that of underdoped cuprates.
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Received: 19 November 2025
Accepted manuscript online: 25 November 2025
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PACS:
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74.25.Jb
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(Electronic structure (photoemission, etc.))
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74.72.-h
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(Cuprate superconductors)
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74.72.Gh
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(Hole-doped)
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| Fund: This work is supported by the National Key Research and Development Program of China (Grant Nos. 2021YFA1401800, 2022YFA1604200, 2022YFA1403900, 2023YFA1406002, 2024YFA1408301 and 2024YFA1408100), the National Natural Science Foundation of China (Grant Nos. 12488201, 12374066, 12374154, and 12494593), Quantum Science and Technology- National Science and Technology Major Project (Grant No. 2021ZD0301800), CAS Superconducting Research Project (Grant No. SCZX-0101), and the Synergetic Extreme Condition User Facility (SECUF). |
Corresponding Authors:
X. J. Zhou
E-mail: xjzhou@iphy.ac.cn
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Cite this article:
Taimin Miao(苗泰民), Wenshan Hong(洪文山), Qinghong Wang(汪清泓), Shanshan Zhang(张珊珊), Bo Liang(梁波), Wenpei Zhu(朱文培), Neng Cai(蔡能), Mingkai Xu(徐明楷), Shenjin Zhang(张申金), Fengfeng Zhang(张丰丰), Feng Yang(杨峰), Zhimin Wang(王志敏), Qinjun Peng(彭钦军), Zuyan Xu(许祖彦), Hanqing Mao(毛寒青), Zhihai Zhu(朱志海), Xintong Li(李昕彤), Guodong Liu(刘国东), Lin Zhao(赵林), Yuan Li(李源), and X. J. Zhou(周兴江) Electronic structure and superconducting gap of HgBa2Ca2Cu3O8+δ revealed by laser-based angle-resolved photoemission spectroscopy 2026 Chin. Phys. B 35 027402
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