Fincher-Burke spin excitations and ω/T scaling in insulating La1.95Sr0.05CuO4

被引：7

作者：

Bao, Wei ^{[1
]}

Chen, Y.

Yamada, K.

Savici, A. T.

Russo, P. L.

Lorenzo, J. E.

Chung, J. -H.

机构：

[1] Los Alamos Natl lab, Los Alamos, NM 87545 USA

[2] NIST, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA

[3] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA

[4] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[5] Brookhaven Natl Lab, Upton, NY 11973 USA

[6] CNRS, Inst Neel, F-38043 Grenoble, France

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 18期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.76.180406

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Insulating La1.95Sr0.05CuO4 shares with superconducting cuprates the same Fincher-Burke spin excitations, which usually are observed in itinerant antiferromagnets. The local spectral function satisfies omega/T scaling above similar to 16 K for this incommensurate insulating cuprate, together with previous results in commensurate insulating and incommensurate superconducting cuprates, further supporting the general prediction for square-lattice quantum spin S=1/2 systems. The width of incommensurate peaks in La1.95Sr0.05CuO4 scales to a similar finite value as at optimal doping, strongly suggesting that they are similarly distant from a quantum critical point. They might both be limited to a finite correlation length by partial spin-glass freezing.

引用

页数：4

共 32 条

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