Optical properties of lattice/magnetic small polarons from DMFF

被引：1

作者：

Ciuchi, S. ^{[1
,2
]}

Cappelluti, E. ^{[3
,4
]}

Fratini, S. ^{[5
,6
,7
]}

机构：

[1] Univ Aquila, Ist Nazl Fis Mat, I-67010 Coppito, Italy

[2] Univ Aquila, Dipartimento Fis, I-67010 Coppito, Italy

[3] CNRS, Inst Neel, F-38042 Grenoble, France

[4] Univ Grenoble 1, F-38042 Grenoble, France

[5] SMC Res Ctr, I-00185 Rome, Italy

[6] INFM CNR, ISC, I-00185 Rome, Italy

[7] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2008年 / 69卷 / 09期

关键词：

Magnetic materials; Super conductors; Optical properties;

D O I：

10.1016/j.jpcs.2008.03.023

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We calculate the optical conductivity of small polarons in the Holstein and Holstein-t-J models, by applying the dynamical mean field theory. We show that the antiferromagnetic correlations tend to increase the region of the parameters where polaronic signatures are found in the optical spectra, and shift the polaronic absorption band to higher frequencies compared to the case of purely lattice polarons. On the other hand, the electron-lattice interaction is essential in order to have polaronic features in the optical absorption. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：2164 / 2167

页数：4

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