摘要
Seeking new order parameters and the related broken symmetry and studying their relationship with phase transition have been important topics in condensed matter physics.Here,by using spin-and angle-resolved photoemission spectroscopy,we confirm the helical spin texture caused by spin-layer locking in the nodal region in the cuprate superconductor Bi_(2)Sr_(2)CaCu_(2)O_(8+δ)and discover the anisotropy of spin polarizations at nodes alongΓ–X andΓ–Y directions.The breaking of C_(4)rotational symmetry in electronic spin texture may give deeper insights into understanding the ground state of cuprate superconductors.
作者
刘文晶
查鹤鸣
顾根大
沈晓萍
叶茂
乔山
Wenjing Liu;Heming Zha;Gen-Da Gu;Xiaoping Shen;Mao Ye;Shan Qiao(State Key Laboratory of Functional Materials for Informatics,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;Condensed Matter Physics and Materials Science Department,Brookhaven National Laboratory,Upton,New York,11973,USA;State Key Laboratory of Surface Physics,Department of Physics,Fudan University,Shanghai 200433,China;School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China)
基金
the National Natural Science Foundation of China(Grant Nos.U1632266,11927807,and U2032207)
the National Key R&D Program of China(Grant No.2017YFA 0305400)
supported by the US Department of Energy,Office of Basic Energy Sciences(Grant Nos.DOE-sc0012704)。
