Orbital-Controlled Superconductivity in f-Electron Systems

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Abstract

We propose a concept of superconductivity controlled by orbital degree of freedom taking Ce<I>M</I>In<SUB>5</SUB> (<I>M</I>=Co, Rh, and Ir) as typical examples. A microscopic multiorbital model for Ce<I>M</I>In<SUB>5</SUB> is analyzed by fluctuation exchange approximation. Even though the Fermi-surface structure is unchanged, the ground state is found to change significantly among paramagnetic, antiferromagnetic, and <I>d</I>-wave superconducting phases, depending on the dominant orbital component in the band near the Fermi energy. We show that our picture naturally explains the different low-temperature properties of Ce<I>M</I>In<SUB>5</SUB> by carefully analyzing the crystalline electric field states.

Journal

  • Journal of the Physical Society of Japan

    Journal of the Physical Society of Japan 75(8), "83702-1"-"83702-5", 2006-08-15

    The Physical Society of Japan (JPS)

References:  37

Cited by:  1

Codes

  • NII Article ID (NAID)
    110004799189
  • NII NACSIS-CAT ID (NCID)
    AA00704814
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    00319015
  • NDL Article ID
    8019699
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z53-A404
  • Data Source
    CJP  CJPref  NDL  NII-ELS  J-STAGE 
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