Theoretical Study on Coexistence of Ferromagnetism and Superconductivity

• Kaneyasu Hirono

  Department of Material Science, University of Hyogo

• Yamada Kosaku

  Department of Physics, Kyoto University

Abstract

On the basis of a two-dimensional t–t′ Hubbard model in ferromagnetic and paramagnetic states, the triplet superconducting mechanism is investigated by the third-order perturbation theory with respect to the on-site Coulomb interaction U. In general, the superconducting state is more stable in the paramagnetic state than in the ferromagnetic state. As a special case, the dominant ferromagnetic superconductivity is obtained by the electron correlation between the electronlike majority and holelike minority bands. Furthermore, it is pointed out that in some cases the two bands play an essential role for the coexistence of superconductivity and ferromagnetism.

Journal

• Journal of the Physical Society of Japan

  Journal of the Physical Society of Japan 74 (2), 527-530, 2005

  THE PHYSICAL SOCIETY OF JAPAN

Keywords

• superconductivity
• ferromagnetism
• Hubbard model
• UGe<SUB>2</SUB>

Details

• CRID: 1390282679165121920
• NII Article ID: 110001979407
• NII Article ID: 210000105845
• NII Article ID: 130004539138
• NII Book ID: AA00704814
• DOI: 10.1143/jpsj.74.527
• BIBCODE: 2005JPSJ...74..527K
• ISSN: 13474073
• ISSN: 00319015
• NDL BIB ID: 7251088
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7251088
• Web Site: http://journals.jps.jp/doi/pdf/10.1143/JPSJ.74.527
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed