Spin-triplet superconductivity in Sr2RuO4 probed by Andreev reflection

被引：178
作者：
Laube, F
Goll, G
von Löhneysen, H
Fogelström, M
Lichtenberg, F
机构：
[1] Univ Karlsruhe, Inst Phys, D-76128 Karlsruhe, Germany
[2] Univ Karlsruhe, Inst Theoret Festkorperphys, D-76128 Karlsruhe, Germany
[3] Univ Augsburg, Inst Phys, D-86135 Augsburg, Germany
来源：
PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 07期
关键词：
D O I：
10.1103/PhysRevLett.84.1595
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The superconducting gap function of Sr2RuO4 was investigated by means of quasiparticle reflection and transmission at the normal conductor-superconductor interface of Sr2RuO4-Pt point contacts. We found two distinctly different types of dV/dI vs V spectra either with a double-minimum structure or with a zero-bias conductance anomaly. Both types of spectra are expected in the limit of high and low transparency, respectively of the interface barrier between a normal metal and a spin-triplet superconductor. Together with the temperature dependence of the spectra this result strongly supports a spin-triplet superconducting order parameter for Sr2RuO4.
引用
收藏
页码：1595 / 1598
页数：4
相关论文
共 26 条
  • [1] TRANSITION FROM METALLIC TO TUNNELING REGIMES IN SUPERCONDUCTING MICRO-CONSTRICTIONS - EXCESS CURRENT, CHARGE IMBALANCE, AND SUPER-CURRENT CONVERSION
    BLONDER, GE
    TINKHAM, M
    KLAPWIJK, TM
    [J]. PHYSICAL REVIEW B, 1982, 25 (07): : 4515 - 4532
  • [2] ANDREEV SCATTERING IN ANISOTROPIC SUPERCONDUCTORS
    BRUDER, C
    [J]. PHYSICAL REVIEW B, 1990, 41 (07): : 4017 - 4032
  • [3] IDENTIFICATION OF P-WAVE SUPERCONDUCTORS
    BUCHHOLTZ, LJ
    ZWICKNAGL, G
    [J]. PHYSICAL REVIEW B, 1981, 23 (11) : 5788 - 5796
  • [4] ANDREEV SCATTERING IN THE ANISOTROPIC HEAVY-FERMION SUPERCONDUCTOR UPT3
    GOLL, G
    BRUDER, C
    VONLOHNEYSEN, H
    [J]. PHYSICAL REVIEW B, 1995, 52 (09): : 6801 - 6807
  • [5] GREENE LH, IN PRESS PHYSICA A B
  • [6] Heffner R. H., 1996, Comments on Condensed Matter Physics, V17, P361
  • [7] Andreev reflection in unitary and non-unitary triplet states
    Honerkamp, C
    Sigrist, M
    [J]. JOURNAL OF LOW TEMPERATURE PHYSICS, 1998, 111 (5-6) : 895 - 915
  • [8] 17O NMR evidence for orbital dependent ferromagnetic correlations in Sr2RuO4
    Imai, T
    Hunt, AW
    Thurber, KR
    Chou, FC
    [J]. PHYSICAL REVIEW LETTERS, 1998, 81 (14) : 3006 - 3009
  • [9] Spin-triplet superconductivity in Sr2RuO4 identified by 17O Knight shift
    Ishida, K
    Mukuda, H
    Kitaoka, Y
    Asayama, K
    Mao, ZQ
    Mori, Y
    Maeno, Y
    [J]. NATURE, 1998, 396 (6712) : 658 - 660
  • [10] c-axis Josephson tunneling between YBa2Cu3O7-delta and Pb: Direct evidence for mixed order parameter symmetry in a high-T-c superconductor
    Kouznetsov, KA
    Sun, AG
    Chen, B
    Katz, AS
    Bahcall, SR
    Clarke, J
    Dynes, RC
    Gajewski, DA
    Han, SH
    Maple, MB
    Giapintzakis, J
    Kim, JT
    Ginsberg, DM
    [J]. PHYSICAL REVIEW LETTERS, 1997, 79 (16) : 3050 - 3053
123