Peierls晶格中的排斥束缚电子对

IF 1.2 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

Revista Mexicana De Fisica Pub Date : 2023-09-01 DOI:10.31349/revmexfis.69.051601

Uriel Alberto Díaz-Reynoso, Ernesto Huipe-Domratcheva, Oracio Navarro

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引用次数: 0

摘要

在Hubbard模型中的Peierls晶格中发现了一类新的排斥束缚电子对，尽管U＞0，但能量E＜0。随着相关能量U和tS/tL跳跃比的增加，这些新的排斥束缚电子对具有高度局域化。为了研究Peierls格中的电子关联，我们以前的实空间映射方法也被推广到了这里简要介绍的广义映射方法。在本文中，我们集中精力详细讨论一维Peierls晶格的排斥Hubbard模型中的两粒子问题。

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Repulsive bound-electron pairs in a Peierls lattice

A new class of repulsive bound-electron pairs have been found in a Peierls lattice within the Hubbard model for energies E < 0 despite U > 0. These new repulsive bound-electron pairs have a high degree of localization as both the correlation energy U and the tS/tL hopping ratio increases. In order to study electronic correlation in Peierls lattices, our previous real space mapping method has also been extended to the so called generalized mapping method which is briefly presented here. In this paper, we concentrate our attention to discuss in detail the two-particle problem within a repulsive Hubbard model for the one-dimensional Peierls lattice.

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来源期刊

Revista Mexicana De Fisica 物理-物理：综合

CiteScore

2.20

自引率

11.80%

发文量

审稿时长

4-8 weeks

期刊介绍： Durante los últimos años, los responsables de la Revista Mexicana de Física, la Revista Mexicana de Física E y la Revista Mexicana de Física S, hemos realizado esfuerzos para fortalecer la presencia de estas publicaciones en nuestra página Web ( http://rmf.smf.mx).