EVIDENCE FOR CHARGE-TRANSFER IN BI-BASED SUPERCONDUCTORS STUDIED BY POSITRON-ANNIHILATION | |
TANG, Z ; WANG, SJ ; GAO, XH ; CE, GC ; ZHAO, ZX | |
刊名 | PHYSICS LETTERS A
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1993 | |
卷号 | 178期号:3-4页码:320 |
关键词 | FERMI-SURFACE 2D-ACAR YBA2CU3O7-X DEFECTS |
ISSN号 | 0375-9601 |
通讯作者 | TANG, Z: WUHAN UNIV,DEPT PHYS,WUHAN 430072,PEOPLES R CHINA. |
中文摘要 | We have measured Doppler-broadening annihilation radiation (DBAR) spectra and positron lifetimes in normal and superconducting states for three kinds of Bi-based superconductors: Bi2212, Pb-doped Bi2223, Pb- and F-doped Bi2223. The difference spectra after deconvolution between two states show a sharpening effect with increasing temperature; the F-doped sample has the greatest amplitude in difference spectra but nearly the same positron lifetimes as the Pb-doped sample. The results are interpreted in terms of charge transfer between the Cu-O and Bi-O planes. The role of oxygen defects in charge transfer is discussed. |
收录类别 | SCI |
语种 | 英语 |
公开日期 | 2013-09-17 |
内容类型 | 期刊论文 |
源URL | [http://ir.iphy.ac.cn/handle/311004/37602] ![]() |
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 | TANG, Z,WANG, SJ,GAO, XH,et al. EVIDENCE FOR CHARGE-TRANSFER IN BI-BASED SUPERCONDUCTORS STUDIED BY POSITRON-ANNIHILATION[J]. PHYSICS LETTERS A,1993,178(3-4):320. |
APA | TANG, Z,WANG, SJ,GAO, XH,CE, GC,&ZHAO, ZX.(1993).EVIDENCE FOR CHARGE-TRANSFER IN BI-BASED SUPERCONDUCTORS STUDIED BY POSITRON-ANNIHILATION.PHYSICS LETTERS A,178(3-4),320. |
MLA | TANG, Z,et al."EVIDENCE FOR CHARGE-TRANSFER IN BI-BASED SUPERCONDUCTORS STUDIED BY POSITRON-ANNIHILATION".PHYSICS LETTERS A 178.3-4(1993):320. |
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