La-NQR Probe of Strong-Coupling s-Wave Superconductivity in LaRu_3Si_2

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Abstract

To investigate the electronic state of LaRu<SUB>3</SUB>Si<SUB>2</SUB>, we have carried out <SUP>139</SUP>La-NQR measurement. In the normal state, the spin–lattice relaxation rate 1⁄<I>T</I><SUB>1</SUB> is proportional to the temperature <I>T</I>. 1⁄<I>T</I><SUB>1</SUB> shows a coherence peak just below the superconducting transition temperature <I>T</I><SUB>c</SUB>=6.5 K and decreases exponentially well below <I>T</I><SUB>c</SUB>. LaRu<SUB>3</SUB>Si<SUB>2</SUB> is found to be a strong coupling BCS superconductor with a large energy gap 2Δ(0)=5.50<I>k</I><SUB>B</SUB><I>T</I><SUB>c</SUB>. A relatively high <I>T</I><SUB>c</SUB> in LaRu<SUB>3</SUB>Si<SUB>2</SUB> is presumably due to a high density of states of conduction electrons at Fermi surface and strong electron–phonon interaction.

Journal

  • Journal of the Physical Society of Japan

    Journal of the Physical Society of Japan 73(1), 190-193, 2004-01-15

    The Physical Society of Japan (JPS)

References:  27

  • <no title>

    LAWRENCE J. M.

    Rep. Prog. Phys. 44, 1, 1981

    Cited by (4)

  • <no title>

    GODART C.

    Phys. Lett. A 120, 427, 1987

    Cited by (2)

  • <no title>

    RAUCHSCHWALBE U.

    Proc. 17th Conf. Low Temperature Physics, 1984, 1984

    Cited by (1)

  • <no title>

    KISHIMOTO Y.

    Phys. Lett. A 317, 308, 2003

    Cited by (1)

  • <no title>

    KISHIMOTO Y.

    J. Phys. Soc. Jpn. 71, 2035, 2002

    Cited by (1)

  • <no title>

    SLICHTER C. P.

    Principles of Magnetic Resonance, 1989

    Cited by (7)

  • <no title>

    ASAYAMA K.

    Nuclear Magnetic Resonance in Itinerant Electron System, 2002

    Cited by (2)

  • <no title>

    NARATH A.

    Phys. Rev. 162, 320, 1961

    Cited by (3)

  • <no title>

    MACLAUGHLIN D. E.

    Solid State Physics 32, 1, 1976

    Cited by (1)

  • <no title>

    ANDERSON P. W.

    Phys. Rev. 123, 1911, 1961

    Cited by (13)

  • <no title>

    HEBEL L. C.

    Phys. Rev. 113, 1504, 1959

    Cited by (5)

  • <no title>

    MCMILLAN W. L.

    Phys.Rev. 167, 331, 1968

    Cited by (13)

  • <no title>

    SWIHART J. C.

    Phys. Rev. Lett. 14, 106, 1965

    Cited by (2)

  • <no title>

    POPPE U.

    J. Low Temp. Phys. 43, 371, 1981

    Cited by (2)

  • <no title>

    FISCHER O.

    Appl. Phys. 16, 1, 1978

    Cited by (3)

  • <no title>

    OHSUGI S.

    J. Phys. Soc. Jpn. 61, 3054, 1992

    Cited by (5)

  • <no title>

    KITAOKA Y.

    Physica C 192, 272, 1992

    Cited by (3)

  • <no title>

    WANG Y.

    Physica C 355, 179, 2001

    Cited by (3)

  • <no title>

    KISHIMOTO Y.

    J. Phys. Soc. Jpn. 64, 1275, 1995

    Cited by (3)

  • <no title>

    ESCORNE M.

    Phys. Rev. B 49, 12051, 1994

    DOI  Cited by (2)

  • <no title>

    RAUCHSCHWALBE U.

    Phys. Rev. B 30, 444, 1984

    DOI  Cited by (3)

  • <no title>

    KISHIMOTO Y.

    Physica B 336, 398, 2003

    Cited by (1)

  • <no title>

    KISHIMOTO Y.

    Physica B 329-333, 495, 2003

    DOI  Cited by (1)

  • <no title>

    VANDENBERG J. M.

    Mater. Res. Bull. 15, 1493, 1980

    Cited by (1)

  • <no title>

    KOTEGAWA H.

    Phys. Rev. Lett. 87, 127001, 2001

    Cited by (11)

  • <no title>

    KISHIMOTO Y.

    Phys. Rev. B 64, 024509, 2001

    Cited by (3)

  • <no title>

    TOXEN A. M.

    Phys. Rev. B 8, 90, 1973

    DOI  Cited by (3)

Codes

  • NII Article ID (NAID)
    110001954710
  • NII NACSIS-CAT ID (NCID)
    AA00704814
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    00319015
  • NDL Article ID
    6817789
  • 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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