POINT-CONTACT TUNNELING STUDY OF HGBA2CUO4+DELTA - BCS-LIKE GAP STRUCTURE

被引：49
|
作者：
CHEN, J [1 ]
ZASADZINSKI, JF [1 ]
GRAY, KE [1 ]
WAGNER, JL [1 ]
HINKS, DG [1 ]
机构：
[1] ARGONNE NATL LAB,TECHNOL CTR SUPERCOND,ARGONNE,IL 60439
来源：
PHYSICAL REVIEW B | 1994年 / 49卷 / 05期
关键词：
D O I：
10.1103/PhysRevB.49.3683
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report on point-contact tunneling into polycrystalline HgBa2CuO4+delta superconductors with a T-c onset of 97 K. Tunneling data follow the general trend of the best curves seen in cuprate high-temperature superconductors, but these show significantly lower and flatter subgap conductance values than any other cuprate and they can be reproducibly obtained. By fitting the data to a smeared BCS density of states, the energy gap has been determined and the smearing parameter is so small that it is comparable to thermal smearing.
引用
收藏
页码：3683 / 3686
页数：4
相关论文
共 50 条
  • [21] IRREVERSIBILITY LINES OF HGBA2CUO4+DELTA WITH DIFFERENT OXYGEN CONTENTS
    USAMI, R
    KUBOTA, H
    PUZNIAK, R
    LIU, CJ
    YAMAUCHI, H
    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 1994, 235 : 2759 - 2760
  • [22] Superconductivity in HgBa2CuO4+delta: A layered electron gas model
    Varshney, D
    Dubey, P
    PHYSICA C, 1997, 282 : 1831 - 1832
  • [23] Superconducting properties of Ce-substituted HgBa2CuO4+delta
    Chae, MS
    Herrmann, J
    Han, SH
    Simnad, MT
    Maple, MB
    SOLID STATE COMMUNICATIONS, 1996, 98 (04) : 333 - 336
  • [24] SYNTHESIS AND START CATION-COMPOSITION OF HGBA2CUO4+DELTA
    XIONG, Q
    CHAN, FT
    XUE, YY
    CHU, CW
    PHYSICA C, 1995, 253 (3-4): : 329 - 333
  • [25] Superconducting properties and anisotropy of a HgBa2CuO4+delta single crystal
    LeBras, G
    Fruchter, L
    Vulcanescu, V
    Viallet, V
    Bertinotti, A
    Forget, A
    Hammann, J
    Marucco, JF
    Colson, D
    PHYSICA C, 1996, 271 (3-4): : 205 - 213
  • [26] UNUSUAL HOLE DEPENDENCE OF T(C) IN HGBA2CUO4+DELTA
    XIONG, Q
    XUE, YY
    CAO, Y
    CHEN, F
    SUN, YY
    GIBSON, J
    CHU, CW
    LIU, LM
    JACOBSON, A
    PHYSICAL REVIEW B, 1994, 50 (14): : 10346 - 10349
  • [27] X-RAY PHOTOELECTRON-SPECTROSCOPY STUDY OF HGBA2CUO4+DELTA
    KIM, HD
    OH, SJ
    YANG, IS
    HUR, NH
    PHYSICA C, 1995, 253 (3-4): : 351 - 356
  • [28] X-ray diffraction study of HgBa2CuO4+delta at high pressures
    Gonzalez, EJ
    WongNg, W
    Piermarini, GJ
    Wolters, C
    Schwartz, J
    POWDER DIFFRACTION, 1997, 12 (02) : 106 - 112
  • [29] Magnetic properties of HgBa2CuO4+delta with varying oxygen content
    Heinze, M
    Baenitz, M
    Luders, K
    Gippius, AA
    Mikhailova, DA
    CZECHOSLOVAK JOURNAL OF PHYSICS, 1996, 46 : 1441 - 1442
  • [30] OXYGEN DEPENDENCE OF THE CRYSTAL-STRUCTURE OF HGBA2CUO4+DELTA AND ITS RELATION TO SUPERCONDUCTIVITY
    HUANG, Q
    LYNN, JW
    XIONG, Q
    CHU, CW
    PHYSICAL REVIEW B, 1995, 52 (01): : 462 - 470
12345