Interplay between dispersive and non-dispersive modes in the polaron problem

被引：15

作者：

Cruzeiro-Hansson, L ^{[1
]}

Eilbeck, JC ^{[1
]}

Marín, JL ^{[1
]}

Russell, FM ^{[1
]}

机构：

[1] Heriot Watt Univ, Dept Math, Edinburgh EH14 4AS, Midlothian, Scotland

来源：

PHYSICS LETTERS A | 2000年 / 266卷 / 2-3期

关键词：

D O I：

10.1016/S0375-9601(00)00029-3

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the influence of the phonon spectrum on polaron formation and show that three self-trapping regimes con occur. If the lattice and the electron-lattice Hamiltonians are dominated by the same type of phonons, the self-trapping transition is smooth. If there is an imbalance, the transition can either be abrupt ol completely eliminated. The binding energies are larger in the case of imbalance. The bandwidth varies linearly with hopping strength, even fur strongly localized states. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：160 / 166

页数：7

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