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首页> 外文期刊>Physica, C. Superconductivity and its applications >Superconductivity in the nonadiabatic limit
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Superconductivity in the nonadiabatic limit

机译：非绝热极限内的超导

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摘要

Isotope-shift exponent (cu) and the pressure coefficient of superconducting transition temperature (beta) have been studied in the nonadiabatic limit. We have considered the effect of nonadiabaticity in both within and beyond the Migdal-Eliashberg formalism. It reveals from our study that the pressure coefficient of superconducting transition is high for the low-T-c region and low for the high-T-c region and the minimum value of alpha is obtained where the transition temperature is maximum. Lowest value of isotope-shift exponent is obtained for small momentum exchange between the electrons and the bosonic field. Qualitative variation of beta with temperature is consistent with the experimental results of the hole doped superconductors for small momentum exchange. (C) 1998 Elsevier Science B.V. [References: 31]
机译：在非绝热极限条件下研究了同位素迁移指数（cu）和超导转变温度的压力系数（β）。我们已经考虑了Migdal-Eliashberg形式主义内部和外部的非绝热效应。从我们的研究中可以看出，超导转变的压力系数在低T-c区域较高，而在高T-c区域较低，并且在过渡温度最高的地方获得了α的最小值。对于电子和波场之间的小动量交换，获得了最低的同位素位移指数值。 β随温度的质变与空穴掺杂超导体用于小动量交换的实验结果一致。 （C）1998 Elsevier Science B.V. [参考：31]

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