POSSIBLE MECHANISM FOR HIGH-TEMPERATURE SUPERCONDUCTIVITY

被引:0
作者
ARSEYEV, PI
机构
来源
ZHURNAL EKSPERIMENTALNOI I TEORETICHESKOI FIZIKI | 1992年 / 101卷 / 04期
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中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
In order to explain the mechanism leading to unusual strong pairing of electrons (holes) within the conducting Cu-0 layers in YBa2Cu307-like high temperature superconductors, a novel model involving the exchange coupling of electrons at the X2-y2 and Z2 Cu levels is suggested. It is shown that the virtual bound states originating from conduction electrons and z2-level electrons play a role of two-particle states. The coupling between such bound states with the total energy close to E(F) and conduction electrons results in high values of T(c) and arbitrary ratios 2-DELTA/T(c) dependent on the energy parameters of the problem. In the framework of the given theory a number of experimental data on HTSC may be explained readily.
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页码:1246 / 1258
页数:13
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