Control of heat transport in quantum spin systems

被引：34

作者：

Yan, Yonghong ^{[1
,2
]}

Wu, Chang-Qin ^{[1
,2
,3
]}

Li, Baowen ^{[1
,2
,4
]}

机构：

[1] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore

[2] Natl Univ Singapore, Ctr Computat Sci & Engn, Singapore 117542, Singapore

[3] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China

[4] NUS Grad Sch Integrat Sci & Engn, Singapore 117597, Singapore

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 01期

关键词：

Heisenberg model; molecular electronics; rectification; spin systems; thermal resistance; SPINTRONICS;

D O I：

10.1103/PhysRevB.79.014207

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study heat transport in quantum spin systems analytically and numerically. First, we demonstrate that heat current through a two-level quantum spin system can be modulated from zero to a finite value by tuning a magnetic field. Second, we show that a spin system, consisting of two dissimilar parts-one is gapped and the other is gapless-exhibits current rectification and negative differential thermal resistance. Possible experimental realizations by using molecular junctions or magnetic materials are discussed.

引用

页数：5

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