| 层状横波光学声子的非简谐性对高温超导电性的影响 |
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| 引用本文： | 汪汉廷,熊诗杰. 层状横波光学声子的非简谐性对高温超导电性的影响[J]. 物理学报, 1992, 41(3): 506-510 |
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| 作者姓名： | 汪汉廷 熊诗杰 |
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| 作者单位： | (1)南京大学物理系,南京,210008; (2)中国高等科学技术中心(世界实验室)理论物理分中心,北京,100080 |
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| 摘 要： | 本文采用二能级(TLS)模型,利用正则变换方法,研究氧化物超导体中层状横波光学声子的非简谐性对层间配对的影响,结果表明:只有在二能级差Ω小于临界值Ωc时,Tc才不为零;Ω越小,Tc越大,这与实验中所显示的绝缘层离子的轴向运动的重要性是一致的。关键词：
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| 关 键 词： | 超导电性 非简谐性 声子 层状横波 |
| 收稿时间： | 1991-04-03 |
EFFECT OF ANHAMONICITY OF LAYERED TRANSVERSE-OPTICAL PHONONS ON HIGH-Tc SUPERCONDUCTIVITY |
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| WANG HAN-TING and XIONG SHI-JIE. EFFECT OF ANHAMONICITY OF LAYERED TRANSVERSE-OPTICAL PHONONS ON HIGH-Tc SUPERCONDUCTIVITY[J]. Acta Physica Sinica, 1992, 41(3): 506-510 |
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| Authors: | WANG HAN-TING and XIONG SHI-JIE |
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| Abstract: | The effect of anhamonicity of layered transverse-optical phonons on the interayer pairing is investigated by a canonical transformation from a two-level-system model. The results show that the critical temperature Tc is zero only when the difference Ω of the two levels is smaller than a critical value Ωc, and Tc increases with the decrease of Ω. It is consistent with the importance of the axial motion of the ions in the insulating sheets as has been revealed by the recent experiments. |
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