Spin waves and electronic interactions in La2CuO4.
Phys Rev Lett
; 86(23): 5377-80, 2001 Jun 04.
Article
em En
| MEDLINE
| ID: mdl-11384502
ABSTRACT
The magnetic excitations of the square-lattice spin-1/2 antiferromagnet and high- T(c) parent compound La2CuO4 are determined using high-resolution inelastic neutron scattering. Sharp spin waves with absolute intensities in agreement with theory including quantum corrections are found throughout the Brillouin zone. The observed dispersion relation shows evidence for substantial interactions beyond the nearest-neighbor Heisenberg term which can be understood in terms of a cyclic or ring exchange due to the strong hybridization path around the Cu4O4 square plaquettes.
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01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2001
Tipo de documento:
Article
País de afiliação:
Estados Unidos