BREAK JUNCTION TUNNELING IN HIGH-TEMPERATURE SUPERCONDUCTORS

被引：0
作者：
PETROV, DK [1 ]
REN, ZE [1 ]
WANG, CA [1 ]
WANG, JH [1 ]
NAUGHTON, MJ [1 ]
机构：
[1] SUNY BUFFALO,NEW YORK STATE INST SUPERCONDUCT,DEPT CHEM,BUFFALO,NY 14260
来源：
APPLIED SUPERCONDUCTIVITY | 1994年 / 2卷 / 10-12期
关键词：
D O I：
10.1016/0964-1807(94)90073-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Mechanically adjustable junctions were formed by breaking samples of Bi2Sr2CaCu2O8 single crystals at low temperatures. The tunneling barrier is associated with a symmetrical Schottky-type barrier arising naturally at the surface. Current-voltage and dynamic conductance-voltage traces show well defined gap structure at voltages +/- 2 Delta/e and a resonant structure at subgap voltages. From the period of the observed oscillations and the layered model of a high temperature superconductor, the Fermi velocity of the quasiparticles is estimated to be nu(F) = 8 x 10(3) m/s. The behavior of the background conductance depends on the barrier parameters and local morphology in the junction region.
引用
收藏
页码：729 / 734
页数：6
相关论文
共 21 条
  • [1] RAMAN LIGHT-SCATTERING BY ELECTRONS IN LAYERED SUPERCONDUCTORS
    ABRIKOSOV, AA
    [J]. PHYSICA C, 1991, 182 (4-6): : 191 - 202
  • [2] AKHATOV K, 1994, JETP LETT+, V59, P240
  • [3] Aminov B. A., 1992, Superconducting Devices and their Applications. Proceedings of the 4th International Conference SQUID '91 (Sessions on Superconducting Devices), P45
  • [4] TEMPERATURE-INDUCED TRANSITION FROM TUNNELING TO METALLIC BEHAVIOR OF BI(2-X)PB(X)SR2CA(N)CU(N+1)O(Y) (X=0.4, N=1 AND N=2) BREAK JUNCTIONS
    AMINOV, BA
    HEIN, MA
    MULLER, G
    OSKINA, TE
    PIEL, H
    PONOMAREV, YG
    TRETYAKOV, YD
    WEHLER, D
    [J]. PHYSICA C, 1994, 224 (3-4): : 321 - 329
  • [5] AMINOV BA, 1991, JETP LETT+, V54, P52
  • [6] BORISOVA IA, 1994, JETP LETT+, V59, P357
  • [7] ELEMENTARY EXCITATIONS IN THE VICINITY OF A NORMAL METAL-SUPERCONDUCTING METAL CONTACT
    DEGENNES, PG
    SAINTJAMES, D
    [J]. PHYSICS LETTERS, 1963, 4 (02): : 151 - 152
  • [8] DIRECT MEASUREMENT OF QUASIPARTICLE-LIFETIME BROADENING IN A STRONG-COUPLED SUPERCONDUCTOR
    DYNES, RC
    NARAYANAMURTI, V
    GARNO, JP
    [J]. PHYSICAL REVIEW LETTERS, 1978, 41 (21) : 1509 - 1512
  • [9] EXPLANATION OF SUB-HARMONIC ENERGY-GAP STRUCTURE IN SUPERCONDUCTING CONTACTS
    KLAPWIJK, TM
    BLONDER, GE
    TINKHAM, M
    [J]. PHYSICA B & C, 1982, 109 (1-3): : 1657 - 1664
  • [10] Korovina E. I., 1991, Superconductivity: Physics, Chemistry, Technology, V4, P2039
123