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题名: Low-frequency spins and the ground state in high-T(c) cuprates
作者: Panagopoulos, C ;  Tallon, JL ;  Rainford, BD ;  Cooper, JR ;  Scott, CA ;  Xiang, T
刊名: SOLID STATE COMMUNICATIONS
出版日期: 2003
卷号: 126, 期号:40910, 页码:47-55
关键词: LIGHTLY DOPED LA2-XSRXCUO4 ;  QUANTUM PHASE-TRANSITIONS ;  AXIS SUPERFLUID RESPONSE ;  COPPER-OXIDE METALS ;  PENETRATION DEPTH ;  ANTIFERROMAGNETIC CORRELATIONS ;  ORDER-PARAMETER ;  STRIPE ORDER ;  CU-63 NQR ;  SUPERCONDUCTORS
学科分类: Physics
通讯作者: Panagopoulos, C , Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England.
部门归属: Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England; Univ Cambridge, Interdisciplinary Res Ctr Superconductiv, Cambridge CB3 0HE, England; Ind Res Ltd, Lower Hutt, New Zealand; Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: We study the spin fluctuations of pure and Zn-substituted high temperature superconductors (HTS) using the muon spin relaxation (muSR) technique. Superconductivity is found to coexist with low frequency spin fluctuations over a large region of the superconducting phase diagram. The characteristic temperature of spin fluctuations detected by muSR decreases with increasing doping and vanishes above a critical doping p(c) approximate to 0.19 where the normal state pseudogap vanishes. Furthermore, it is at pc that our penetration depth studies show an abrupt change in the doping dependence of the superfluid density, p(s.) For p > p(c) the absolute value of p(s) is large and nearly independent of carrier concentration whereas for p < p(c) it drops rapidly, signalling a crossover to weak superconductivity. These results are discussed in terms of a quantum transition involving fluctuating short-range magnetic order that separates the superconducting phase diagram of HTS into two distinct ground states. (C) 2003 Elsevier Science Ltd. All rights reserved.
收录类别: SCI
原文出处: 查看原文
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13352
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Panagopoulos, C,Tallon, JL,Rainford, BD,et al. Low-frequency spins and the ground state in high-T(c) cuprates[J]. SOLID STATE COMMUNICATIONS,2003,126(40910):47-55.
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