Excitation gap in the normal state of underdoped Bi2Sr2CaCu2O8+delta

被引:878
作者
Loeser, AG
Shen, ZX
Dessau, DS
Marshall, DS
Park, CH
Fournier, P
Kapitulnik, A
机构
[1] STANFORD UNIV, SOLID STATE LAB, STANFORD, CA 94305 USA
[2] STANFORD UNIV, DEPT APPL PHYS, STANFORD, CA 94305 USA
关键词
D O I
10.1126/science.273.5273.325
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Angle-resolved photoemission experiments reveal evidence of an energy gap in the normal state excitation spectrum of the cuprate superconductor Bi2Sr2CaCu2O8+delta. This gap exists only in underdoped samples and closes around the doping level at which the superconducting transition temperature T-c is a maximum. The momentum dependence and magnitude of the gap closely resemble those of the d(x2-y2) gap observed in the superconducting state. This observation is consistent with results from several other experimental techniques, which also indicate the presence of a gap in the normal stale. Some possible theoretical explanations for this effect are reviewed.
引用
收藏
页码:325 / 329
页数:5
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共 41 条
  • [1] LDA energy bands, low-energy Hamiltonians, t', t'', t perpendicular to(k), and J perpendicular to.
    Andersen, OK
    Liechtenstein, AI
    Jepsen, O
    Paulsen, F
    [J]. JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1995, 56 (12) : 1573 - 1591
  • [2] THE RESONATING VALENCE BOND STATE IN LA2CUO4 AND SUPERCONDUCTIVITY
    ANDERSON, PW
    [J]. SCIENCE, 1987, 235 (4793) : 1196 - 1198
  • [3] THEORY OF SUPERCONDUCTIVITY
    BARDEEN, J
    COOPER, LN
    SCHRIEFFER, JR
    [J]. PHYSICAL REVIEW, 1957, 108 (05): : 1175 - 1204
  • [4] PHYSICAL-PROPERTIES OF HIGH-TC SUPERCONDUCTORS
    BARTLOGG, B
    [J]. PHYSICS TODAY, 1991, 44 (06) : 44 - 50
  • [5] NORMAL-STATE PHASE-DIAGRAM OF (LA,SR)(2)CUO4 FROM CHARGE AND SPIN DYNAMICS
    BATLOGG, B
    HWANG, HY
    TAKAGI, H
    CAVA, RJ
    KAO, HL
    KWO, J
    [J]. PHYSICA C, 1994, 235 : 130 - 133
  • [6] DISTINGUISHING D-WAVE SUPERCONDUCTORS FROM HIGHLY ANISOTROPIC S-WAVE SUPERCONDUCTORS
    BORKOWSKI, LS
    HIRSCHFELD, PJ
    [J]. PHYSICAL REVIEW B, 1994, 49 (21): : 15404 - 15407
  • [7] NATURE OF THE HIGH-BINDING-ENERGY DIP IN THE LOW-TEMPERATURE PHOTOEMISSION SPECTRA OF BI2SR2CACU2O8+DELTA
    DESSAU, DS
    SHEN, ZX
    WELLS, BO
    KING, DM
    SPICER, WE
    ARKO, AJ
    LOMBARDO, LW
    MITZI, DB
    KAPITULNIK, A
    [J]. PHYSICAL REVIEW B, 1992, 45 (09): : 5095 - 5098
  • [8] LONG-RANGE COULOMB INTERACTIONS AND THE ONSET OF SUPERCONDUCTIVITY IN THE HIGH-TC MATERIALS
    DONIACH, S
    INUI, M
    [J]. PHYSICAL REVIEW B, 1990, 41 (10): : 6668 - 6678
  • [9] IMPORTANCE OF PHASE FLUCTUATIONS IN SUPERCONDUCTORS WITH SMALL SUPERFLUID DENSITY
    EMERY, VJ
    KIVELSON, SA
    [J]. NATURE, 1995, 374 (6521) : 434 - 437
  • [10] HOLE CONCENTRATION AND TC IN BI2SR2CACU2O8+DELTA
    GROEN, WA
    DELEEUW, DM
    FEINER, LF
    [J]. PHYSICA C, 1990, 165 (01): : 55 - 61