AN ANALYSIS OF THE SPIN WAVE APPROXIMATION FOR THE SPIN 1/2 ANTIFERROMAGNET | Zendy

D. Kung | Zendy

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AN ANALYSIS OF THE SPIN WAVE APPROXIMATION FOR THE SPIN 1/2 ANTIFERROMAGNET

Author(s) -

D. Kung

Publication year - 1984

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/1447257

Subject(s) - antiferromagnetism , spin wave , spin (aerodynamics) , condensed matter physics , physics , ferromagnetism , thermodynamics

: A calculation has been done on the one and two dimension Heisenberg antiferromagnet in an alternating field to extract the external field critical exponent. The results obtained by the Projector Monte Carlo Method on finite lattices are extrapolated to the infinite volume limit using finite size scaling. The exponents are calculated to be 0.62 and 0.69 in one and two dimensions respectively, contradicting the estimate (0.5 in any dimension) predicted by the spin-wave approximation. Submitted to Physica Review B * This work was supported by the Department of Energy under Contract Number DEACO& 76SF00515.

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