Author:
Li 李 Shuaishuai 帅帅,Miao 苗 Taimin 泰民,Yin 殷 Chaohui 超辉,Li 李 Yinghao 颖昊,Yan 闫 Hongtao 宏涛,Chen 陈 Yiwen 逸雯,Liang 梁 Bo 波,Chen 陈 Hao 浩,Zhu 朱 Wenpei 文培,Zhang 张 Shenjin 申金,Wang 王 Zhimin 志敏,Zhang 张 Fengfeng 丰丰,Yang 杨 Feng 峰,Peng 彭 Qinjun 钦军,Lin 林 Chengtian 成天,Mao 毛 Hanqing 寒青,Liu 刘 Guodong 国东,Xu 许 Zuyan 祖彦,Zhao 赵 Lin 林,Zhou 周 X J 兴江
Abstract
The spatially-resolved laser-based high-resolution angle resolved photoemission spectroscopy (ARPES) measurements have been performed on the optimally-doped YBa2Cu3O7–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.
Subject
General Physics and Astronomy