Mobile small bipolarons on a three-dimensional cubic lattice

被引：9

作者：

Davenport, A. R. ^{[1
]}

Hague, J. P. ^{[1
]}

Kornilovitch, P. E. ^{[2
]}

机构：

[1] Open Univ, Dept Phys Sci, Milton Keynes MK7 6AA, Bucks, England

[2] Hewlett Packard Corp, Corvallis, OR 97330 USA

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 03期

基金：

英国工程与自然科学研究理事会;

关键词：

HIGH-TEMPERATURE SUPERCONDUCTIVITY; MODEL;

D O I：

10.1103/PhysRevB.86.035106

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We use numerically exact quantum Monte Carlo (QMC) to compute the properties of three-dimensional bipolarons for interaction strengths where perturbation theory fails. For intermediate electron-phonon coupling and Hubbard U, we find that bipolarons can be both small and light, a prerequisite for bipolaron superconductivity. We use the QMC results to make estimates of transition temperatures, which peak at between 90-120 K and are demonstrated to be insensitive to Coulomb repulsion and impurities.

引用

页数：11

共 31 条

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