Theory of Superconductivity in PuCoGa_5

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Author(s)

Abstract

Recently, superconductivity in PuCoGa_5 was discovered. It has the same crystal structure as CeMIn_5 (M = Ir, Co, Rh), which are often refered to as Ce-115's. The electron correlation in PuCoGa_5 is estimated to be weak compared with Ce-115's, and the filling number of electrons is considered to be far from 0.5/spin in the band which plays an important role in realizing the superconductivity. Nevertheless, the superconducting transition temperature T_c in PuCoGa_5 is almost by an order of magnitude higher than that in Ce-115's. In order to explain the superconductivity with high T_c, we adopt the periodic Anderson model and calculate T_c by solving the Dyson-Gor'kov equation derived by the third order perturbation theory with respect to U. By this calculation, we indicate that the superconducting state of PuCoGa_5 is a d-wave pairing state, and show that the good location of two Fermi surfaces results in the high T_c in PuCoGa_5.

Journal

  • Journal of the Physical Society of Japan

    Journal of the Physical Society of Japan 73(5), 1285-1289, 2004-05-15

    The Physical Society of Japan (JPS)

References:  13

Cited by:  1

Codes

  • NII Article ID (NAID)
    110001954845
  • NII NACSIS-CAT ID (NCID)
    AA00704814
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    00319015
  • NDL Article ID
    6940855
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z53-A404
  • Data Source
    CJP  CJPref  NDL  NII-ELS 
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