^<209>Bi-NQR Investigation of the Non-magnetic Heavy-fermion Compound CeRhBi

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Abstract

We report the results of <SUP>209</SUP>Bi-NQR measurements on the heavy-fermion compound CeRhBi with the large electronic specific heat coefficient γ∼500 mJ/mol·K<SUP>2</SUP> at 2 K. From the Bi-NQR spectra, it is proved that no magnetic ordering occurs down to 0.15 K. The temperature dependence of nuclear spin–lattice relaxation rate 1⁄<I>T</I><SUB>1</SUB> clearly demonstrates a crossover from a localized regime at high temperature to an itinerant ground state with the Kondo temperature <I>T</I><SUB>K</SUB> of about 8 K. It is, therefore, revealed that CeRhBi is a typical heavy-fermion compound with a non-magnetic ground state, closely located at a quantum critical point. In the context of CeRhPn (Pn = Bi, Sb, As) series, where all compounds crystallize in the same orthorhombic ε-TiNiSi-type structure, no trace of gap formation is observed in 1⁄<I>T</I><SUB>1</SUB> down to 0.2 K in CeRhBi, although the values of 1⁄<I>T</I><SUB>1</SUB> in the Kondo semiconductors CeRhSb and CeRhAs markedly decrease at low temperatures due to the presence of excitation gap.

Journal

  • Journal of the Physical Society of Japan

    Journal of the Physical Society of Japan 73(3), 694-697, 2004-03-15

    The Physical Society of Japan (JPS)

References:  25

Codes

  • NII Article ID (NAID)
    110001954797
  • NII NACSIS-CAT ID (NCID)
    AA00704814
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    00319015
  • NDL Article ID
    6887573
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z53-A404
  • Data Source
    CJP  NDL  NII-ELS  J-STAGE 
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