STRUCTURAL CHARACTERISTICS OF BI-BASED SUPERCONDUCTORS STUDIED BY POSITRON-ANNIHILATION

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	STRUCTURAL CHARACTERISTICS OF BI-BASED SUPERCONDUCTORS STUDIED BY POSITRON-ANNIHILATION
	WANG, SJ ; TANG, Z ; GAO, XH ; ZHAO, ZX
刊名	JOURNAL DE PHYSIQUE IV
	1993
卷号	3 期号:C4 页码:213
ISSN号	1155-4339
通讯作者	WANG, SJ (reprint author), WUHAN UNIV,DEPT PHYS,WUSHAN 430072,PEOPLES R CHINA.
中文摘要	We have measured the positron lifetime spectra as a function of temperature from 80 to 300 K and Doppler-broadening annihilation radiation (DBAR) spectra in normal and superconducting states for three kinds of Bi-based superconductors: Bi2212, Pb- and F-doped Bi2223. For Pb-doped Bi2223 superconductor, anomalies in the temperature dependence of positron lifetimes indicate the structural instabilities. However, a continuous increasing in the mean lifetime is observed for F-doped Bi2223 system and interpreted in terms of a simple thermal expansion with an average linear expansion coefficient alpha is similar to 35*10(-6). The difference spectra of DBAR spectra after deconvolution between two states show an evidence for charge transfer between the Cu-O and Bi-O planes in Bi-based superconductors. The role of oxygen defects in charge transfer was discussed.
收录类别	SCI
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/53281]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	WANG, SJ,TANG, Z,GAO, XH,et al. STRUCTURAL CHARACTERISTICS OF BI-BASED SUPERCONDUCTORS STUDIED BY POSITRON-ANNIHILATION[J]. JOURNAL DE PHYSIQUE IV,1993,3(C4):213.
APA	WANG, SJ,TANG, Z,GAO, XH,&ZHAO, ZX.(1993).STRUCTURAL CHARACTERISTICS OF BI-BASED SUPERCONDUCTORS STUDIED BY POSITRON-ANNIHILATION.JOURNAL DE PHYSIQUE IV,3(C4),213.
MLA	WANG, SJ,et al."STRUCTURAL CHARACTERISTICS OF BI-BASED SUPERCONDUCTORS STUDIED BY POSITRON-ANNIHILATION".JOURNAL DE PHYSIQUE IV 3.C4(1993):213.