Criterion for Weak Spin-Orbit Coupling in Heavy-Fermion Superconductivity: Numerical Renormalization-Group Study

• Kusunose Hiroaki

  Department of Physics, Tohoku University

Abstract

A criterion for effective irrelevancy of the spin–orbit coupling in heavy-fermion superconductivity is discussed on the basis of the impurity Anderson model with two sets of Kramers doublets. Using Wilson’s numerical renormalization-group method, we demonstrate a formation of the quasi-particle as well as the renormalization of the rotational symmetry-breaking interaction in the lower Kramers doublet (quasi-spin) space. A comparison with the quasi-spin conserving interaction exhibits the effective irrelevancy of the rotational symmetry-breaking interaction for the splitting of two doublets Δ larger than the characteristic energy of the local spin fluctuation T_K. The relevance to lattice models is briefly discussed.

Journal

• Journal of the Physical Society of Japan

  Journal of the Physical Society of Japan 74 (8), 2157-2160, 2005

  THE PHYSICAL SOCIETY OF JAPAN

Keywords

• spin–orbit coupling
• triplet pairing
• numerical renormalization group
• crystal field

Details

• CRID: 1390282679164683136
• NII Article ID: 110001979680
• NII Article ID: 210000105569
• NII Article ID: 130004539368
• NII Book ID: AA00704814
• DOI: 10.1143/jpsj.74.2157
• BIBCODE: 2005JPSJ...74.2157K
• ISSN: 13474073
• ISSN: 00319015
• NDL BIB ID: 7393778
• Web Site: http://id.ndl.go.jp/bib/7393778
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7393778
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.74.2157
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed