STM STS STUDY OF SINGLE CRYSTALLINE BI2SR2CACU2OY (2) - ELECTRONIC NATURE OF THE BIO LAYER AS A FUNCTION OF OXYGEN-CONTENT

被引:16
作者
WEI, W
NANTOH, M
IKUTA, H
HASEGAWA, T
KITAZAWA, K
机构
[1] Department of Industrial Chemistry, University of Tokyo, Bunkyo-ku, Tokyo
来源
PHYSICA C | 1991年 / 185卷
关键词
D O I
10.1016/0921-4534(91)91655-N
中图分类号
O59 [应用物理学];
学科分类号
摘要
The electronic nature of the BiO layer in Bi2Sr2CaCu2Oy was studied as a function of oxygen content by STM/STS at room temperature and cryogenic temperatures down to 4.2 K. The conductance (dI/dV) vs V curve taken on the cleaved surface exhibited relatively large energy gap of approximately 0.1 eV, but no BCS-like peak was observed. This result suggests that the BiO layer is essentially insulative even below Tc. Furthermore, the specimens annealed under oxidized atmosphere tended to show metallic tunneling behavior. It seems that the incorporation of oxygen content in the BiO layer increases the density of states in the vicinity of the Fermi level.
引用
收藏
页码:863 / 864
页数:2
相关论文
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