Absence of Hybridization Gap in Heavy Electron Systems and Analysis of YbAl_3 in Terms of Nearly Free Electron Conduction Band

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Author(s)

Abstract

In the analysis of the heavy electron systems, theoretical models with c-f hybridization gap are often used. We point out that such a gap does not exist and the simple picture with the hybridization gap is misleading in the metallic systems, and present a correct picture by explicitly constructing an effective band model of YbAl_3. Hamiltonian consists of a nearly free electron model for conduction bands which hybridize with localized f-electrons, and includes only a few parameters. Density of states, Sommerfeld coefficient, f-electron number and optical conductivity are calculated and compared with the band calculations and the experiments.

Journal

  • Journal of the Physical Society of Japan

    Journal of the Physical Society of Japan 76(12), "124704-1"-"124704-8", 2007-12-15

    The Physical Society of Japan (JPS)

References:  26

Codes

  • NII Article ID (NAID)
    110006532206
  • NII NACSIS-CAT ID (NCID)
    AA00704814
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    00319015
  • NDL Article ID
    9305226
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z53-A404
  • Data Source
    CJP  NDL  NII-ELS 
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