Numerically rigorous results for the ground state of exciton-lattice systems

被引：4

作者：

Noba, K ^{[1
]}

Kayanuma, Y ^{[1
]}

机构：

[1] Univ Osaka Prefecture, Coll Engn, Sakai, Osaka 5998531, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1998年 / 67卷 / 11期

关键词：

self-trapping; small polaron; exciton-lattice interaction; dimensionality; discrete lattice model; adiabatic approximation;

D O I：

10.1143/JPSJ.67.3972

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Numerical calculations of the ground state in the exciton-lattice system are performed for a small polaron model with the adiabatic approximation. Stable and metastable states of the system are obtained rigorously without presuming any spatial pattern of the lattice distortion. The energy and the spatial extension of the stable states are obtained for one, two, three dimension cases. The characteristic feature of the self-trapping is revealed for the each dimension and critical values of the exciton-lattice coupling constants are also obtained. They are compared with those of previous studies where the spatial pattern of the lattice distortion is presumed.

引用

页码：3972 / 3975

页数：4

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