Spin correlations of 2D quantum antiferromagnet at low temperatures and a direct comparison with neutron-scattering experiments

Journal Article · Mon Mar 19 00:00:00 EST 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.64.1449· OSTI ID:7122713

Ding, H; Makivic, M S ^[1]

---

1. Concurrent Computation Program, California Inst. of Tech., Pasadena, CA (USA) Physics Department, California Institute of Technology, Pasadena, California 91125 (USA)

Correlation functions of the spin-1/2 2D Heisenberg antiferromagnet at low temperatures are computed via a large-scale Monte Carlo simulation on 128{times}128 lattices. The correlation length is found to be accurately described by the exponentially divergent form typical of classical Heisenberg spins in two dimensions. The large correlation lengths measured are directly compared with the neutron-scattering experiments on La{sub 2}CuO{sub 4}. The excellent fit provides a first-principles determination of the exchange coupling: {ital J}=1450 {plus minus}30 K.

• DOE Contract Number: FG03-85ER25009; AC03-81ER40050
• OSTI ID: 7122713
• Journal Information: Physical Review Letters; (USA), Vol. 64:12; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANTIFERROMAGNETIC MATERIALS
CORRELATION FUNCTIONS
ALGORITHMS
COPPER OXIDES
CORRELATIONS
EXCHANGE INTERACTIONS
HEISENBERG MODEL
LANTHANUM OXIDES
LOW TEMPERATURE
MONTE CARLO METHOD
NEUTRON DIFFRACTION
PARTITION FUNCTIONS
QUANTIZATION
SIMULATION
TEMPERATURE DEPENDENCE
THEORETICAL DATA
THIN FILMS
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
CRYSTAL MODELS
DATA
DIFFRACTION
FILMS
FUNCTIONS
INFORMATION
INTERACTIONS
LANTHANUM COMPOUNDS
MAGNETIC MATERIALS
MATERIALS
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
SCATTERING
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties