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

Journal Article · · Physical Review Letters; (United States)
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  1. Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States) Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (United States) Department of Physics, Tohoku University, Sendai 980 (Japan)
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.
DOE Contract Number:
AC02-76CH00016
OSTI ID:
5143375
Journal Information:
Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 72:7; ISSN 0031-9007; ISSN PRLTAO
Country of Publication:
United States
Language:
English