Conservation of the particle–hole symmetry in the pseudogap state in optimally-doped Bi_(2)Sr_(2)CuO_(6+δ) superconductor  

作　　者：Hongtao Yan Qiang Gao Chunyao Song Chaohui Yin Yiwen Chen Fengfeng Zhang Feng Yang Shenjin Zhang Qinjun Peng Guodong Liu Lin Zhao Zuyan Xu X.J.Zhou 闫宏涛;高强;宋春尧;殷超辉;陈逸雯;张丰丰;杨峰;张申金;彭钦军;刘国东;赵林;许祖彦;周兴江(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;Songshan Lake Materials Laboratory,Dongguan 523808,China;Beijing Academy of Quantum Information Sciences,Beijing 100193,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]Songshan Lake Materials Laboratory,Dongguan 523808,China [5]Beijing Academy of Quantum Information Sciences,Beijing 100193,China

出　　处：《Chinese Physics B》2022年第8期178-182,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos. 11888101, 11922414 and 11974404);the National Key Research and Development Program of China (Grant Nos. 2021YFA1401800, 2017YFA0302900, 2018YFA0305602, 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 the Chinese Academy of Sciences (Grant No. 2021006);the Synergetic Extreme Condition User Facility (SECUF);the Research Program of Beijing Academy of Quantum Information Sciences (Grant No. Y18G06)。

摘　　要：The pseudogap state is one of the most enigmatic characteristics in the anomalous normal state properties of the high temperature cuprate superconductors. A central issue is to reveal whether there is a symmetry breaking and which symmetries are broken across the pseudogap transition. By performing high resolution laser-based angle-resolved photoemission measurements on the optimally-doped Bi_(2)Sr_(1.6)La_(0.4)CuO_(6+δ) superconductor, we report the observations of the particle-hole symmetry conservation in both the superconducting state and the pseudogap state along the entire Fermi surface. These results provide key insights in understanding the nature of the pseudogap and its relation with high temperature superconductivity.

关 键 词：PSEUDOGAP symmetry breaking ARPES 

分 类 号：O511[理学—低温物理]