Spin excitations and exchange couplings in the cuprate antiferromagnet La2CuO4

被引：5

作者：

Coldea, R ^{[1
]}

Hayden, SM

Aeppli, G

Perring, TG

Frost, CD

Mason, TE

Cheong, SW

Fisk, Z

机构：

[1] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[2] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[3] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England

[4] NEC Res Inst, Princeton, NJ 08540 USA

[5] Lucent Technol, Murray Hill, NJ 07974 USA

[6] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA

来源：

PHYSICA B | 2000年 / 276卷

关键词：

high-T-c superconductors; two-dimensional systems; spin waves; antiferromagnetism;

D O I：

10.1016/S0921-4526(99)01772-X

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The spin excitations in La2CuO4, a two-dimensional spin-1/2 Heisenberg antiferromagnet and parent compound of high-T-c, superconductors, have been measured throughout the Brillouin zone using high-resolution inelastic neutron scattering. The observed dispersion relations show evidence for substantial second- or third-nearest-neighbour exchange couplings in addition to the strong first nearest-neighbour antiferromagnetic exchange. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：592 / 593

页数：2

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