High-energy spin waves in La sub 2 CuO sub 4

Journal Article · Mon Dec 16 04:00:00 EST 1991 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.67.3622· OSTI ID:5947107

Hayden, S M; Aeppli, G; Osborn, R; Taylor, A D; Perring, T G; Cheong, S; Fisk, Z ^[1]

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1. H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL (UK) AT T Bell Laboratories, Murray Hill, New Jersey 07974 (United States) Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX (UK) Clarendon Laboratory, University of Oxford, Parks Road, Oxford (UK) Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

Time-of-flight spectrocopy using neutrons produced by a spallation source is used to measure the one-magnon scattering throughout the Brillouin zone for La{sub 2}CuO{sub 4}. The zone-boundary magnons have an energy {h bar}{omega}{sub ZB}=0.312{plus minus}0.005 eV and are good eigenstates of the quantum Heisenberg Hamiltonian in that they possess lifetimes {gt}10/{omega}. A multiplicative renormalization of the overall frequency scale of classical spin-wave theory accounts for the quantum effects in the one-magnon spectrum.

• OSTI ID: 5947107
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 67:25; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ANTIFERROMAGNETIC MATERIALS
BEAMS
CHALCOGENIDES
COPPER COMPOUNDS
CUPRATES
DISPERSION RELATIONS
ENERGY-LEVEL TRANSITIONS
EXCITATION
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC MATERIALS
MAGNONS
MATERIALS
NEUTRON BEAMS
NEUTRON SPECTROSCOPY
NUCLEON BEAMS
OXIDES
OXYGEN COMPOUNDS
PARTICLE BEAMS
QUASI PARTICLES
RARE EARTH COMPOUNDS
SPECTROSCOPY
SPIN WAVES
TIME-OF-FLIGHT METHOD
TRANSITION ELEMENT COMPOUNDS