Intrinsic electronic structure and nodeless superconducting gap of YBa_(2)Cu_(3)O_(7)-σ observed by spatially-resolved laser-based angle resolved photoemission spectroscopy  

作　　者：李帅帅 苗泰民 殷超辉 李颖昊 闫宏涛 陈逸雯 梁波 陈浩 朱文培 张申金 王志敏 张丰丰 杨峰 彭钦军 林成天 毛寒青 刘国东 许祖彦 赵林 周兴江 Shuaishuai Li;Taimin Miao;Chaohui Yin;Yinghao Li;Hongtao Yan;Yiwen Chen;Bo Liang;Hao Chen;Wenpei Zhu;Shenjin Zhang;Zhimin Wang;Fengfeng ZhangFeng Yang;Qinjun Peng;Chengtian Lin;Hanqing Mao;Guodong Liu;Zuyan Xu;Lin Zhao;X J Zhou(National Laboratory for Superconductivity,Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;Max Planck Institute for Solid State Research,Heisenbergstrasse1,D-70569 Stuttgart,Germany;Songshan Lake Materials Laboratory,Dongguan 523808,China)

机构地区：[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,Heisenbergstrasse1,D-70569 Stuttgart,Germany [5]Songshan Lake Materials Laboratory,Dongguan 523808,China

出　　处：《Chinese Physics B》2023年第11期263-268,共6页中国物理B（英文版）

基　　金：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);the Synergetic Extreme Condition User Facility (SECUF)。

摘　　要：The spatially-resolved laser-based high-resolution angle resolved photoemission spectroscopy(ARPES) measurements have been performed on the optimally-doped YBa_(2)Cu_(3)O_(7)-σ(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 

分 类 号：O469[理学—凝聚态物理]