Spin-wave velocity and susceptibility for the two-dimensional Heisenberg antiferromagnet

The two physical parameters needed to specify the long-wavelength properties of a spin-1/2 quantum antiferromagnet are determined numerically. The fluctuation-induced renormalization of the stiffness constant differs by 40% from the expansion results of Oguchi, necessitating a corresponding adjustme...

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Bibliographic Details
Published in:Physical review. B, Condensed matter Condensed matter, 1989-12, Vol.40 (16), p.11328-11330
Main Authors: GROSS, M, SANCHEZ-VELASCO, E, SIGGIA, E. D
Format: Article
Language:English
Subjects:
656002 - Condensed Matter Physics- General Techniques in Condensed Matter- (1987-)
ANTIFERROMAGNETIC MATERIALS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Condensed matter: electronic structure, electrical, magnetic, and optical properties
CORRELATION FUNCTIONS
CRYSTAL MODELS
Exact sciences and technology
FUNCTIONS
General theory and models of magnetic ordering
HEISENBERG MODEL
MAGNETIC MATERIALS
Magnetic properties and materials
MATERIALS
MATHEMATICAL MODELS
PARTICLE MODELS
Physics
Quantized spin models
RENORMALIZATION
SIGMA MODEL
SPIN WAVES
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Summary:The two physical parameters needed to specify the long-wavelength properties of a spin-1/2 quantum antiferromagnet are determined numerically. The fluctuation-induced renormalization of the stiffness constant differs by 40% from the expansion results of Oguchi, necessitating a corresponding adjustment in the value of the exchange deduced from the measured correlation length.
ISSN:0163-1829
1095-3795
DOI:10.1103/physrevb.40.11328