Doping evolution of nodal electron dynamics in trilayer cuprate superconductor Bi2Sr2Ca2Cu3O10+δ revealed by laser-based angle-resolved photoemission spectroscopy
Year: 2025
Type: article
Abstract: The doping evolution of the nodal electron dynamics in the trilayer cuprate superconductor Bi2Sr2Ca2Cu3O10+δ (Bi2223) is investigated using high-resolution laser-based angle-resolved photoemission spectroscopy (ARPES). Bi2223 single crystals with different doping levels are prepared by controlled annealing, which cover the underdoped, optimally-doped and overdoped regions. The electronic phase diagram of Bi2223 is established which describes the T c dependence on the sample doping level. The doping dependence of the nodal Fermi momentum for the outer (OP) and inner (IP) CuO2 planes is determined. Charge distribution imbalance between the OP and IP CuO2 planes is quantified, showing enhanced disparity with increasing doping. Nodal band dispersions demonstrate a prominent kink at ∼ 94 meV in the IP band, attributed to the unique Cu coordination in the IP plane, while a weaker ∼ 60 meV kink is observed in the OP band. The nodal Fermi velocity of both OP and IP bands is nearly constant at ∼ 1.62 eV⋅Å independent of doping. These results provide important information to understand the origin of high T c and superconductivity mechanism in high temperature cuprate superconductors.
Source: Chinese Physics B
Authors: Hao 浩 Chen 陈, Jumin 聚民 Shi 史, Xiangyu 翔宇 Luo 罗, Yinghao 颖昊 Li 李, Yiwen 逸雯 Chen 陈, Chaohui 超辉 Yin 殷, Yingjie 英杰 Shu 束, Jiuxiang 九相 Zhang 张, Taimin 泰民 Miao 苗, Bo 波 Liang 梁, Wenpei 文培 Zhu 朱, Neng 能 Cai 蔡, Xiaolin 晓琳 Ren 任, Chengtian 成天 Lin 林, Shenjin 申金 Zhang 张, Zhimin 志敏 Wang 王, Fengfeng 丰丰 Zhang 张, Feng 峰 Yang 杨, Qinjun 钦军 Peng 彭, Zuyan 祖彦 Xu 许, Guodong 国东 Liu 刘, Hanqing 寒青 Mao 毛, Xintong 昕彤 Li 李, Lin 林 Zhao 赵, X. J. 兴江 Zhou 周
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4410633245