Spin correlations in the 2D Heisenberg antiferromagnet Sr[sub 2]CuO[sub 2]Cl[sub 2]: Neutron scattering, Monte Carlo simulation, and theory

We report a neutron scattering study of the spin correlations in the model 2D, [ital S]=1/2, square-lattice Heisenberg antiferromagnetic Sr[sub 2]CuO[sub 2]Cl[sub 2]. The spin correlation lengths obtained agree quantitatively with values deduced from Monte Carlo simulations over a wide range of temp...

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Bibliographic Details
Published in:Physical review letters 1994-02, Vol.72:7
Main Authors: Greven, M., Birgeneau, R.J., Endoh, Y., Kastner, M.A., Keimer, B., Matsuda, M., Shirane, G., Thurston, T.R.
Format: Article
Language:English
Subjects:
665000 - Physics of Condensed Matter- (1992-)
ALKALINE EARTH METAL COMPOUNDS
ANGULAR MOMENTUM
ANTIFERROMAGNETIC MATERIALS
BOSON-EXCHANGE MODELS
CALCULATION METHODS
CHALCOGENIDES
CHLORINE COMPOUNDS
CHLORINE OXIDES
COHERENT SCATTERING
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
COPPER COMPOUNDS
COPPER OXIDES
CORRELATED-PARTICLE MODELS
DIFFRACTION
HALOGEN COMPOUNDS
MAGNETIC MATERIALS
MATERIALS
MATHEMATICAL MODELS
MONTE CARLO METHOD
NEUTRON DIFFRACTION
NEUTRON SPECTRA
OXIDES
OXYGEN COMPOUNDS
PARTICLE MODELS
PARTICLE PROPERTIES
PERIPHERAL MODELS
SCATTERING
SIGMA MODEL
SPECTRA
SPIN
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
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Summary:We report a neutron scattering study of the spin correlations in the model 2D, [ital S]=1/2, square-lattice Heisenberg antiferromagnetic Sr[sub 2]CuO[sub 2]Cl[sub 2]. The spin correlation lengths obtained agree quantitatively with values deduced from Monte Carlo simulations over a wide range of temperature. The combined data, which cover the length scale from 1 to 200 lattice constants, are predicted accurately with no adjustable parameters by renormalized classical theory for the quantum nonlinear sigma model.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.72.1096