摘要
High quality single crystals of heavy Fermion CeCoIn_(5) superconductor have been grown by flux method with a typical size of(1-2)×(1-2)×(~0.1)mm^(3).The single crystals are characterized by structural analysis from x-ray diffraction and Laue diffraction,as well as compositional analysis.Magnetic and electrical measurements on the single crystals show a sharp superconducting transition with a transition temperature at T_(c,onset)~2.3 K and a transition width of~0.15 K.The resistivity of the CeCoIn_(5) crystal exhibits a hump at~45 K,which is typical of a heavy Fermion system.High resolution angle-resolved photoemission spectroscopy(ARPES)measurements of CeCoIn_(5) reveal clear Fermi surface sheets that are consistent with the band structure calculations when assuming itinerant Ce 4f electrons at low temperature.This work provides important information on the electronic structure of heavy Fermion CeCoIn_(5) superconductor.It also lays a foundation for further studies on the physical properties and superconducting mechanism of the heavy Fermion superconductors.
作者
贾小文
刘艳
俞理
何俊峰
赵林
张文涛
刘海云
刘国栋
何少龙
张君
陆伟
武岳
董晓莉
孙力玲
王桂玲
朱镛
王晓阳
彭钦军
王志民
张申金
杨峰
许祖彦
陈创天
周兴江
JIA Xiao-Wen;LIU Yan;YU Li;HE Jun-Feng;ZHAO Lin;ZHANG Wen-Tao;LIU Hai-Yun;LIU Guo-Dong;HE Shao-Long;ZHANG Jun;LU Wei;WU Yue;DONG-Xiao-Li;SUN Li-Ling;WANG Gui-Ling;ZHU Yong;WANG Xiao-Yang;PENG Qin-Jun;WANG Zhi-Min;ZHANG Sheh-Jin;YANG Feng;XU Zu-Yan;CHEN Chuang-Tian;ZHOU Xing-Jiang(National Lab for Superconductivity,Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190;Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190)
基金
Supported by the National Natural Science Foundation of China under Grant No 10734120
the National Basic Research Prograom of China under Grant No 2011CB921703.