Gap Formation in the Filled Skutterudite CeOs_4Sb_<12>

Access this Article

Search this Article

Author(s)

Abstract

We have studied the optical conductivity of the filled skutterudite CeOs<SUB>4</SUB>Sb<SUB>12</SUB>. The optical conductivity spectra show a strong temperature dependence and reveal an energy gap of ∼30 meV below 60 K. This shows that the density of states near the Fermi level of CeOs<SUB>4</SUB>Sb<SUB>12</SUB> is strongly reduced. In addition to the gap formation, a pronounced peak is observed at ∼70 meV below 160 K. This mid-infrared peak is interpreted in terms of optical excitations across a hybridization gap consisting of conduction- and <I>f</I>-electron states. The observed characteristics in the optical spectra are quite similar to those previously reported for Kondo semiconductors. We compare the optical characteristics of CeOs<SUB>4</SUB>Sb<SUB>12</SUB> found in the present work with other physical properties, and analyze its electronic structures.

Journal

  • Journal of the Physical Society of Japan

    Journal of the Physical Society of Japan 72(11), 2722-2725, 2003-11-15

    The Physical Society of Japan (JPS)

References:  28

  • <no title>

    MAPLE M. B.

    Physica B 328, 29, 2003

    Cited by (1)

  • <no title>

    SATO H.

    Physica B 328, 34, 2003

    Cited by (1)

  • <no title>

    SHIROTANI I.

    J. Solid State Chem. 142, 146, 1999

    Cited by (4)

  • <no title>

    GRANDJEAN F.

    J. Phys. Chem. Solids 45, 877, 1984

    Cited by (2)

  • <no title>

    NORDSTROM L.

    Phys. Rev. B 53, 1103, 1996

    Cited by (2)

  • <no title>

    MORELLI D. T.

    J. Appl. Phys. 77, 3777, 1995

    Cited by (4)

  • <no title>

    TAKEDA N.

    J. Phys. Soc. Jpn. 69, 868, 2000

    Cited by (9)

  • <no title>

    BAUER E. D.

    J. Phys. : Condens. Matter 13, 4495, 2001

    Cited by (3)

  • <no title>

    NAMIKI T.

    Acta Phys. Pol. B 34, 1161, 2003

    Cited by (2)

  • <no title>

    AEPPLI G.

    Matter Phys. 16, 155, 1992

    Cited by (1)

  • <no title>

    HOMES C.

    Appl. Opt. 32, 2976, 1993

    Cited by (2)

  • <no title>

    TRAVAGLINI G.

    Phys. Rev. B 29, 893, 1984

    Cited by (4)

  • <no title>

    KIMURA S.

    Phys. Rev. B 50, 1406, 1994

    Cited by (5)

  • <no title>

    OKAMURA H.

    Phys.Rev.B 58, R7496, 1998

    Cited by (8)

  • <no title>

    WOOTEN F.

    Optical Properties of Solids, 1972

    Cited by (20)

  • <no title>

    MILLIS A. J.

    Phys. Rev. B 35, 3394, 1987

    Cited by (6)

  • <no title>

    DEGIORGI L.

    Rev. Mod. Phys. 71, 687, 1999

    Cited by (3)

  • <no title>

    DEGIORGI L.

    Eur. Phys. J. B 19, 167, 1999

    Cited by (1)

  • <no title>

    OKAMURA H.

    Physics of Strongly Correlated Electron Systems

    Cited by (1)

  • <no title>

    WEBB B. C.

    Phys. Rev. Lett. 57, 1951, 1986

    Cited by (4)

  • <no title>

    OKAMURA H.

    Acta Phys. Pol. B 34, 1075, 2003

    Cited by (2)

  • <no title>

    MATSUNAMI M.

    Proc. Int. Conf. Strongly Correlated Electrons with Orbital Degrees of Freedom, 2002

    Cited by (1)

  • <no title>

    DORDEVIC S. V.

    Phys. Rev. Lett. 86, 684, 2001

    Cited by (3)

  • <no title>

    NAKAMOTO G.

    J.Phys.Soc.Jpn. 64, 4834, 1995

    Cited by (10)

  • <no title>

    MEISNER G. P.

    J. Appl. Phys. 57, 3073, 1985

    DOI  Cited by (6)

  • <no title>

    CHEN B. X.

    Phys.Rev.B 55, 1476-1480, 1997

    Cited by (9)

  • <no title>

    GAJEWSKI D. A.

    J. Phys.: Condens. Matter 10, 6973, 1998

    Cited by (4)

  • <no title>

    BUCHER B.

    Phys. Rev. B 53, R2948, 1996

    Cited by (3)

Cited by:  2

Codes

  • NII Article ID (NAID)
    110001954295
  • NII NACSIS-CAT ID (NCID)
    AA00704814
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    00319015
  • NDL Article ID
    6744954
  • 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 
Page Top