ON THE INFLUENCE OF ANHARMONICITY ON THE ISOTOPE EFFECT

被引：11

作者：

GALBAATAR, T

DRECHSLER, SL

PLAKIDA, NM

VUJICIC, GM

机构：

[1] Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Moscow, 101000

来源：

PHYSICA C | 1991年 / 185卷

关键词：

D O I：

10.1016/0921-4534(91)90891-2

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effect of double-well type lattice anharmonicity on the superconducting temperature and its isotope effect is investigated beyond the two-level approximation (TLA) within the Eliashberg theory. It is shown that anharmonicity can greatly modify the isotope effect; In particular anomalously large as well as negative values of the isotope effect exponent-alpha are obtained in the strong and weak coupling limits, respectively.

引用

页码：1529 / 1530

页数：2

共 12 条

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[9] GAP FUNCTION AND DENSITY OF STATES IN THE STRONG-COUPLING LIMIT FOR AN ELECTRON-BOSON SYSTEM
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