TEMPERATURE DEPENDENCE OF POSITRON ANNIHILATION PARAMETERS IN HIGH Tc SUPERCONDUCTOR YBa2 Cu3 O7-x
LI Anli, ZHENG Shengnan, HUANG Hanchen, LI Donghong, DU Hongshan, DIN Honglin, SUN Hancheng, ZHU Shengyun
Institute of Atomic Energy, Beijing 102413
TEMPERATURE DEPENDENCE OF POSITRON ANNIHILATION PARAMETERS IN HIGH Tc SUPERCONDUCTOR YBa2 Cu3 O7-x
LI Anli;ZHENG Shengnan;HUANG Hanchen;LI Donghong;DU Hongshan;DIN Honglin;SUN Hancheng;ZHU Shengyun
Institute of Atomic Energy, Beijing 102413
关键词 ：
74.10.+v ,
61.80.Fe
Abstract ： The temperature dependences of the positron annihilation lifetime and the Doppler broadening shape parameters have been measured in high Tc superconductors YBa2 Cu3 O7-x = between 77.2 and 300K. The measured parameters show an abrupt change across the range of superconducting transition temperature, indicating a change of the electronic structure. The structural instabilities have also been observed in three higher temperature ranges of115-135, 150-210 and 250-280K. This suggests that higher Tc superconductors might be found in these temperature ranges.
Key words ：
74.10.+v
61.80.Fe
出版日期: 1989-12-01
:
74.10.+v
(Occurrence, potential candidates)
61.80.Fe
(Electron and positron radiation effects)
引用本文:
LI Anli;ZHENG Shengnan;HUANG Hanchen;LI Donghong;DU Hongshan;DIN Honglin;SUN Hancheng;ZHU Shengyun
. TEMPERATURE DEPENDENCE OF POSITRON ANNIHILATION PARAMETERS IN HIGH Tc SUPERCONDUCTOR YBa2 Cu3 O7-x
[J]. 中国物理快报, 1989, 6(12): 549-552.
2 Cu3 O7-x
. Chin. Phys. Lett., 1989, 6(12): 549-552.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y1989/V6/I12/549
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