Thermal conductivity and Lorenz number for one-dimensional ballistic transport

被引：58

作者：

Greiner, A

Reggiani, L

Kuhn, T

Varani, L

机构：

[1] UNIV MUNSTER, INST THEORET PHYS 2, D-48149 MUNSTER, GERMANY

[2] UNIV MONTPELLIER 2, CNRS UMR 5507, CTR ELECT & MICROOPTOELECT MONTPELLIER, F-34095 MONTPELLIER 5, FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.78.1114

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the thermal conductivity and Lorenz number of charge carriers for one-dimensional ballistic transport within the correlation function formalism. The carrier transit time between two ideal contacts is found to substitute for the collision time in the definition of a ballistic thermal conductivity. A universal thermal conductance K = 2 pi(2)k(B)(2)T/3h is naturally obtained for the degenerate case. Dispersion curves for the thermal conductivity and the Lorenz number associated with different time scales belonging to the microscopic system are given for the first time.

引用

页码：1114 / 1117

页数：4

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