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Spin waves and electronic interactions in La2CuO4

Coldea, R; Hayden, SM; Aepplli, G; Perring, TG; Frost, CD; Mason, TE; Cheong, SW; (2001) Spin waves and electronic interactions in La2CuO4. Physical Review Letters , 86 (23) 5377 - 5380. 10.1103/PhysRevLett.86.5377. Green open access

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Abstract

The magnetic excitations of the square-lattice spin-1/2 antiferromagnet and high- Tc 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.

Type: Article
Title: Spin waves and electronic interactions in La2CuO4
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.86.5377
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.86.5377
Language: English
Additional information: © 2001 The American Physical Society
Keywords: Condensed Matter and Materials Physics, interaction, Spin waves, spin-waves, waves
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/188126
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