Control of heat transport in quantum spin systems

Control of heat transport in quantum spin systems
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量子自旋系统中热传输的控制

DOI:
10.1103/physrevb.79.014207
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发表时间:
2008-07
期刊:
影响因子:
3.7
通讯作者:
Wu, Chang-Qin
Wu, Chang-Qin
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Yan, Yonghong;Li, Baowen;Wu, Chang-Qin

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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\char22{}one is gapped and the other is gapless\char22{}exhibits current rectification and negative differential thermal resistance. Possible experimental realizations by using molecular junctions or magnetic materials are discussed.
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