Continuously Doping Bi_(2)Sr_(2)CaCu_(2)O_(8+δ)into Electron-Doped Superconductor by CaH_(2)Annealing Method  

作　　者：Jin Zhao Yu-Lin Gan Guang Yang Yi-Gui Zhong Cen-Yao Tang Fa-Zhi Yang Giao Ngoc Phan Qiang-Tao Sui Zhong Liu Gang Li Xiang-Gang Qiu Qing-Hua Zhang Jie Shen Tian Qian Li Lu Lei Yan Gen-Da Gu Hong Ding 赵金;甘渝林;杨光;钟益桂;唐岑瑶;杨发枝;Giao Ngoc Phan;随强涛;刘忠;李岗;邱祥冈;张庆华;沈洁;钱天;吕力;颜雷;顾根大;丁洪(Beijing National Laboratory for Condensed Matter Physics,and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physics,University of Chinese Academy of Sciences,Beijing 100190,China;Institute for Solid State Physics,University of Tokyo,Chiba 277-8581,Japan;Songshan Lake Materials Laboratory,Dongguan 523808,China;Condensed Matter Physics and Materials Science Department,Brookhaven National Laboratory,Upton,New York 11973,USA)

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics,and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [2]School of Physics,University of Chinese Academy of Sciences,Beijing 100190,China [3]Institute for Solid State Physics,University of Tokyo,Chiba 277-8581,Japan [4]Songshan Lake Materials Laboratory,Dongguan 523808,China [5]Condensed Matter Physics and Materials Science Department,Brookhaven National Laboratory,Upton,New York 11973,USA

出　　处：《Chinese Physics Letters》2022年第7期93-97,共5页中国物理快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11888101 and U1832202);the Chinese Academy of Sciences(Grant Nos.QYZDB-SSWSLH043 and XDB33000000);the K.C.Wong Education Foundation(Grant No.GJTD-2018-01);the Informatization Plan of Chinese Academy of Sciences(Grant No.CAS-WX2021SF-0102);supported by the Synergetic Extreme Condition User Facility(SECUF);supported by China Postdoctoral Science Foundation(Grant Nos.2020M680726 and YJ20200325);supported by US DOE(Grant Nos.DE-SC0010526 and DE-SC0012704)。

摘　　要：As a typical hole-doped cuprate superconductor,Bi_(2)Sr_(2)CaCu_(2)O_(8+δ)(Bi2212)carrier doping is mostly determined by its oxygen content.Traditional doping methods can regulate its doping level within the range of hole doping.Here we report the first application of CaH_(2)annealing method in regulating the doping level of Bi2212.By continuously controlling the anneal time,a series of differently doped samples can be obtained.The combined experimental results of x-ray diffraction,scanning transmission electron microscopy,resistance and Hall measurements demonstrate that the CaH_(2)induced topochemical reaction can effectively change the oxygen content of Bi2212 within a very wide range,even switching from hole doping to electron doping.We also found evidence of a low-T_c superconducting phase in the electron doping side.

关 键 词：into Electron-Doped Superconductor by CaH_(2)Annealing Method Continuously Doping Bi_(2)Sr_(2)CaCu_(2)O 

分 类 号：O469[理学—凝聚态物理]