Dynamical mean-field theory of transport of small polarons

被引：92

作者：

Fratini, S

Ciuchi, S

机构：

[1] CNRS, Etud Proprietes Elect Solides Lab, F-38042 Grenoble 9, France

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

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

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.91.256403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a unified view of the transport properties of small polarons in the Holstein model at low carrier densities, based on the dynamical mean-field theory. The nonperturbative nature of the approach allows us to study the crossover from classical activated motion at high temperatures to coherent motion at low temperatures. Large quantitative discrepancies from the standard polaronic formulas are found. The scaling properties of the resistivity are analyzed, and a simple interpolation formula is proposed in the nonadiabatic regime.

引用

页数：4

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