Cooper pairing of fermions with unequal masses in heavy-fermion systems

Keisuke Masuda, Daisuke Yamamoto

Research output: Contribution to journalArticle

Abstract

We investigate the Cooper pairing between a conduction-band electron (c electron) and an f electron as a possible mechanism of the s-wave superconductivity in heavy-fermion materials. We first obtain an effective Hamiltonian of the system by applying the Schrieffer- Wolff transformation to the periodic Anderson model. The effective Hamiltonian includes spin-exchange and direct interactions between c and f electrons, which play the role of a glue for the s-wave c-f pairing. This pairing may arise from the fact that the strong Hubbard interaction forms the quasiparticle f band near the center of the c band.

Original languageEnglish
Article numberSB010
JournalJournal of the Physical Society of Japan
Volume81
Issue numberSUPPL.B
Publication statusPublished - 2012 Sep

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heavy fermion systems
fermions
glues
electrons
spin exchange
conduction bands
superconductivity
interactions

Keywords

  • C-f pairing
  • Heavy-fermion systems
  • S-wave superconductivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Cooper pairing of fermions with unequal masses in heavy-fermion systems. / Masuda, Keisuke; Yamamoto, Daisuke.

In: Journal of the Physical Society of Japan, Vol. 81, No. SUPPL.B, SB010, 09.2012.

Research output: Contribution to journalArticle

Masuda, Keisuke ; Yamamoto, Daisuke. / Cooper pairing of fermions with unequal masses in heavy-fermion systems. In: Journal of the Physical Society of Japan. 2012 ; Vol. 81, No. SUPPL.B.
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