CU NMR AND NQR STUDIES OF HIGH-TC SUPERCONDUCTOR LA2-XSRXCUO4

被引:148
作者
OHSUGI, SK
KITAOKA, Y
ISHIDA, K
ZHENG, GQ
ASAYAMA, K
机构
[1] Department of Material Physics, Faculty of Engineering Science, Osaka University, Toyonaka
关键词
LA2-XSRXCUO4; HIGH-TC SUPERCONDUCTIVITY; CU NMR AND NQR; D-WAVE; GAPLESS SUPERCONDUCTIVITY; ANTIFERROMAGNETIC SPIN CORRELATION; STRUCTURAL INSTABILITY;
D O I
10.1143/JPSJ.63.700
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Results of extensive Cu NMR and NQR studies in the superconducting La2-xSrxCuO4 with x=0.075-0.24 have been presented. The rapid decrease of the nuclear spin-lattice relaxation rate, 1/T1, and the spin Knight shift below T(c) confirm microscopically the existence of the superconducting phase with lower T(c) than 38 K for 0.10 less-than-or-equal-to x less-than-or-equal-to 0.24. For x = 0.10, magnetic anomalies emerge at low-T in some small parts of the sample, e.g. T-independent T1 and broadening of spectrum, having some relevance to the magnetic order in La2 BaxCuO4 with x = 0.125. For x>0.15, the T1T = const. behavior and the existence of the residual spin Knight shift far below T(c) have revealed that the superconductivity is of a gapless type with a finite density of states at the Fermi level caused by the mixture of different structures, i.e. tetragonal and orthorhombic.
引用
收藏
页码:700 / 715
页数:16
相关论文
共 46 条
  • [21] PHENOMENOLOGICAL MODEL OF NUCLEAR-RELAXATION IN THE NORMAL STATE OF YBA2CU3O7
    MILLIS, AJ
    MONIEN, H
    PINES, D
    [J]. PHYSICAL REVIEW B, 1990, 42 (01) : 167 - 178
  • [22] ANISOTROPIC PAIRING IN HEAVY FERMION SUPERCONDUCTORS - ITS ORIGIN AND EFFECTS ON TRANSPORT-PROPERTIES
    MIYAKE, K
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1987, 63-4 : 411 - 419
  • [23] MIYAKE K, COMMUNICATION
  • [24] APPLICATION OF THE ANTIFERROMAGNETIC-FERMI-LIQUID THEORY TO NMR EXPERIMENTS ON YBA2CU3O6.63
    MONIEN, H
    PINES, D
    TAKIGAWA, M
    [J]. PHYSICAL REVIEW B, 1991, 43 (01): : 258 - 274
  • [25] APPLICATION OF ANTIFERROMAGNETIC-FERMI-LIQUID THEORY TO NMR EXPERIMENTS IN LA1.85SR0.15CUO4
    MONIEN, H
    MONTHOUX, P
    PINES, D
    [J]. PHYSICAL REVIEW B, 1991, 43 (01): : 275 - 287
  • [26] ANTIFERROMAGNETIC SPIN FLUCTUATIONS AND SUPERCONDUCTIVITY IN 2-DIMENSIONAL METALS - A POSSIBLE MODEL FOR HIGH-TC OXIDES
    MORIYA, T
    TAKAHASHI, Y
    UEDA, K
    [J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1990, 59 (08) : 2905 - 2915
  • [27] COMMON FEATURES OF MAGNETIC AND SUPERCONDUCTING PROPERTIES IN Y-DOPED BI2(SR,CA)3CU2O8 AND BA(SR)-DOPED LA2CUO4
    ODA, M
    MATSUKI, H
    IDO, M
    [J]. SOLID STATE COMMUNICATIONS, 1990, 74 (12) : 1321 - 1326
  • [28] MAGNETIC DEPAIRING IN HIGHLY-DOPED LA2CUO4
    ODA, M
    NAKANO, T
    KAMADA, Y
    IDO, M
    [J]. PHYSICA C, 1991, 185 : 1157 - 1158
  • [29] NUCLEAR-RELAXATION STUDY IN STRONG COUPLING SUPERCONDUCTORS - A COMPARISON WITH HIGH-TC SUPERCONDUCTORS
    OHSUGI, S
    KITAOKA, Y
    KYOGAKU, M
    ISHIDA, K
    ASAYAMA, K
    OHTANI, T
    [J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1992, 61 (09) : 3054 - 3057
  • [30] CU NQR STUDY OF THE SPIN DYNAMICS IN HIGH-TC SUPERCONDUCTOR LA2-XSRXCUO4
    OHSUGI, S
    KITAOKA, Y
    ISHIDA, K
    ASAYAMA, K
    [J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1991, 60 (07) : 2351 - 2360