Thermomagnetic power and figure of merit for spin-1/2 Heisenberg chain

Shunsuke Furukawa, Dai Ikeda, Kazumitsu Sakai

研究成果: Article査読

12 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)3241-3247
ページ数7
ジャーナルJournal of the Physical Society of Japan
74
12
DOI
出版ステータスPublished - 2005 12
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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