Electronic Band Structure and Fermi Surface of Heavy-Fermion Neptunium Superconductor NpPd<SUB>5</SUB>Al<SUB>2</SUB>

• Yamagami Hiroshi

  Department of Physics, Faculty of Science, Kyoto Sangyo University

• Aoki Dai

  Institute for Materials Research, Tohoku University

• Haga Yoshinori

  Advanced Science Research Center, Japan Atomic Energy Agency

• Onuki Yoshichika

  Graduate School of Science, Osaka University

Bibliographic Information

Other Title

• Electronic band structure and Fermi surface of heavy-fermion neptunium superconductor NpPd5Al2

Abstract

Electronic band structure calculations were carried out for a new neptunium superconductor NpPd₅Al₂ using a relativistic linear-augmented plane wave method within a local density approximation. The Fermi energy in the band structure is found to be located just on the 5f-bands of the j=5⁄2 state with the extremely narrow band width and therefore the theoretical electronic specific heat coefficient γ_b is extremely large, being γ_b=74.0 mJ/(K²·mol), which is compared to γ=390 mJ/(K²·mol) estimated experimentally. NpPd₅Al₂ is an uncompensated metal. The main electron Fermi surface corresponds to a doughnut-like flat Fermi surface centered at the Γ point which is connected with cylindrical Fermi surfaces elongated along the X–W–P line.

Journal

• Journal of the Physical Society of Japan

  Journal of the Physical Society of Japan 76 (8), 083708-083708, 2007

  THE PHYSICAL SOCIETY OF JAPAN

Keywords

• NpPd<SUB>5</SUB>Al<SUB>2</SUB>
• band structure
• Fermi surface

Details

• CRID: 1390282679173152384
• NII Article ID: 130005296976
• NII Article ID: 110006366837
• NII Article ID: 210000106825
• NII Book ID: AA00704814
• DOI: 10.1143/jpsj.76.083708
• ISSN: 13474073
• ISSN: 00319015
• NDL BIB ID: 8863469
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8863469
• Web Site: http://journals.jps.jp/doi/pdf/10.1143/JPSJ.76.083708
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed