Dynamic correlations in a classical two-dimensional Heisenberg antiferromagnet

Journal Article · Sun Jul 01 00:00:00 EDT 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.42.810· OSTI ID:6550611

Wysin, G M ^[1]; Bishop, A R ^[2]

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1. Department of Physics, Cardwell Hall, Kansas State University, Manhattan, KS (USA)
2. Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM (USA) Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, NM (USA)

A Monte Carlo molecular-dynamics calculation of the dynamic structure function {ital S}({bold q},{omega}) for the classical two-dimensional isotropic Heisenberg antiferromagnet is presented. For wave vectors near the antiferromagnetic Bragg point, {ital S}({bold q},{omega}) is well described by a product of Lorentzians representing damped spin waves. For adequately low temperatures, the dependence of the spin-wave frequency and damping on wave vector and temperature are consistent with a dynamic scaling description of Chakravarty, Halperin, and Nelson. Even for higher temperatures a scaling description is quite well satisfied, but with a modified scaling frequency.

• OSTI ID: 6550611
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 42:1; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANGULAR MOMENTUM
ANTIFERROMAGNETISM
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CORRELATION FUNCTIONS
CRYSTAL MODELS
DYNAMICS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FUNCTIONS
HEISENBERG MODEL
HIGH-TC SUPERCONDUCTORS
MAGNETISM
MATHEMATICAL MODELS
MECHANICS
OXIDES
OXYGEN COMPOUNDS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
SPIN
STRUCTURE FUNCTIONS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
TWO-DIMENSIONAL CALCULATIONS