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Low-frequency spins and the ground state in high-T(c) cuprates
Panagopoulos, C; Tallon, JL; Rainford, BD; Cooper, JR; Scott, CA; Xiang, T; Panagopoulos, C , Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England.
2003
发表期刊SOLID STATE COMMUNICATIONS
ISSN0038-1098
卷号126期号:40910页码:47-55
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.
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
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
学科领域Physics
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收录类别SCI
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13352
专题1978-2010年知识产出
通讯作者Panagopoulos, C , Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England.
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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.
APA Panagopoulos, C.,Tallon, JL.,Rainford, BD.,Cooper, JR.,Scott, CA.,...&Panagopoulos, C , Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England..(2003).Low-frequency spins and the ground state in high-T(c) cuprates.SOLID STATE COMMUNICATIONS,126(40910),47-55.
MLA Panagopoulos, C,et al."Low-frequency spins and the ground state in high-T(c) cuprates".SOLID STATE COMMUNICATIONS 126.40910(2003):47-55.
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