共 1 条
- [1] Electronic structure of high temperature oxide super-conductors. Xu J H. Prog Phys . 1988
PHONON-EXCITON MECHANISM IN YBa2Cu3O7-δ SYSTEM
被引：1
作者：
李贞姬
李凤月
机构：
[1] China
[2] Xi’an 710049
[3] Department of Physics Xi’an Jiaotong University
关键词：
phonon-exciton mechanism;
transition temperature;
YBCO system;
D O I：
暂无
中图分类号：
O511.2 [];
学科分类号：
070205 ;
080705 ;
摘要：
In this paper, based on the phonon-exciton mechanism, the superconductivity of yttrium barium copper oxide (YBCO) system is explained. The transition temperature (T_C)’s formula is derived by the extended BCS-Eliashberg theory, i.e. phonon-exciton mechanism and McMillan’s energy gap function, and the T_C’s expressions is reduced by using the Einstein spectrum. Last, the calculating method of element metal effective phonon spectrum is used to the high T_C cuprate YBCO system by using a crystal average atom approximation model. The theoretical analysis and calculational results show that the superconductivity of high T_C YBCO system maybe described by phonon-exciton model.
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页码：28 / 31
页数：4
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