Thermomagnetic Power and Figure of Merit for Spin-1/2 Heisenberg Chain(Condensed Matter : Structure, Mechanical and Thermal Properties)
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概要
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Transport properties in the presence of magnetic fields are numerically studied for the spin-1/2 Heisenberg XXZ chain. The breakdown of the spin-reversal symmetry due to the magnetic field induces the magnetothermal effect. In analogy with the thermoelectric effect in electron systems, the thermomagnetic power (magnetic Seebeck coefficient) is provided, and is numerically evaluated by the exact diagonalization for wide ranges of temperatures and various magnetic fields. For the antiferromagnetic regime, we find the magnetic Seebeck coefficient changes sign at certain temperatures, which is interpreted as an effect of strong correlations. We also compute the thermomagnetic figure of merit determining the efficiency of the thermomagnetic devices for cooling or power generation.
- 社団法人日本物理学会の論文
- 2005-12-15
著者
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FURUKAWA Shunsuke
Department of Physics, Tokyo Institute of Technology
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Furukawa Shunsuke
Condensed Matter Theory Laboratory Riken
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Furukawa Shunsuke
Department Of Chemistry Graduate School Of Science The University Of Tokyo
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Sakai Kazumitsu
Department Of Physics Tokyo Institute Of Technology
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IKEDA Dai
Department of Physics, Tokyo Institute of Technology
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Ikeda Dai
Department Of Physics Tokyo Institute Of Technology
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Furukawa Shunsuke
Riken Saitama
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