Thermomagnetic Power and Figure of Merit for Spin-1/2 Heisenberg Chain

• Furukawa Shunsuke

  Department of Physics, Tokyo Institute of Technology

• Ikeda Dai

  Department of Physics, Tokyo Institute of Technology

• Sakai Kazumitsu

  Department of Physics, Tokyo Institute of Technology

Abstract

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.

Journal

• Journal of the Physical Society of Japan

  Journal of the Physical Society of Japan 74 (12), 3241-3247, 2005

  THE PHYSICAL SOCIETY OF JAPAN

Keywords

• transport properties
• thermal conductivity
• magnetothermal effect
• Seebeck coefficient
• figure of merit
• Heisenberg chain
• quantum integrable system

Details

• CRID: 1390282679163546496
• NII Article ID: 110002975246
• NII Article ID: 130004539099
• NII Article ID: 210000105782
• NII Book ID: AA00704814
• DOI: 10.1143/jpsj.74.3241
• BIBCODE: 2005JPSJ...74.3241F
• ISSN: 13474073
• ISSN: 00319015
• NDL BIB ID: 7741229
• Web Site: http://id.ndl.go.jp/bib/7741229
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7741229
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.74.3241
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed