Low-frequency spins and the ground state in high-T(c) cuprates

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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.
刊名	SOLID STATE COMMUNICATIONS
	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
ISSN号	0038-1098
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.
学科主题	Physics
URL标识	查看原文
公开日期	2012-08-29
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/13352]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Panagopoulos, C , Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England.
推荐引用方式 GB/T 7714	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.