Spin excitations and exchange couplings in the cuprate antiferromagnet La2CuO4

Authors
Coldea, R Hayden, SM Aeppli, G Perring, TG Frost, CD Mason, TE Cheong, SW Fisk, Z
Citation
R. Coldea et al., Spin excitations and exchange couplings in the cuprate antiferromagnet La2CuO4, PHYSICA B, 276, 2000, pp. 592-593
Citations number
8
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA B
ISSN journal
09214526 → ACNP
Volume
276
Year of publication
2000
Pages
592 - 593
Database
ISI
SICI code
0921-4526(200003)276:<592:SEAECI>2.0.ZU;2-Y
Abstract
The spin excitations in La2CuO4, a two-dimensional spin-1/2 Heisenberg anti ferromagnet and parent compound of high-T-c, superconductors, have been mea sured throughout the Brillouin zone using high-resolution inelastic neutron scattering. The observed dispersion relations show evidence for substantia l second- or third-nearest-neighbour exchange couplings in addition to the strong first nearest-neighbour antiferromagnetic exchange. (C) 2000 Elsevie r Science B.V. All rights reserved.