STRUCTURAL CHARACTERISTICS OF BI-BASED SUPERCONDUCTORS STUDIED BY POSITRON-ANNIHILATION | |
WANG, SJ ; TANG, Z ; GAO, XH ; ZHAO, ZX | |
刊名 | JOURNAL DE PHYSIQUE IV
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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. |
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