Open AccessANISOTROPIC RESISTIVITIES OF SINGLE CRYSTAL Bi2Sr2CaCu2O8+δ WITH DIFFERENT OXYGEN CONTENTS
Author(s) -
Min Yu,
Xianhui Chen,
Keqing Ruan,
Shiyan Li,
Guofu Zhou,
Guochun Zhang,
Chen Zhuyao,
Lei Cao
Publication year - 1999
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.48.363
Subject(s) - anisotropy , electrical resistivity and conductivity , condensed matter physics , bipolaron , materials science , single crystal , oxygen , plane (geometry) , crystallography , physics , chemistry , polaron , optics , geometry , electron , quantum mechanics , mathematics
The in-plane resistivity ρab(T) and the out-of-plane ρc(T) have been extensively measured for pure single crystal Bi2Sr2CaCu2O8+δ(Bi2212) annealed at different oxygen pressures.The ρc(T) and anisotropy (ρc(T)/ρab(T)) decrease rapidly with increasing carrier concentration.It is found that the out-of-plane resistivity decreases linearly with decreasing temperature down to about 120K for the overdoped sample,its resistivity anisotropy is of weak temperature dependence.The data of ρc(T) and ρc(T)/ρab(T) are well fitted by the bipolaron theory proposed by Alexandrov and Mott.