Results are presented for the kinetics of domain growth of a two-dimensional Ising spin model with competing interactions quenched from a disordered to a striped phase. The domain growth exponents are beta=1/2 and beta=1/3 for single-spin-flip and spin-exchange dynamics, as found in previous simulations. However, the correlation functions measured in the direction parallel and transverse to the stripes are different as suggested by the existence of different interface energies between the ground states of the model. In the case of single-spin-flip dynamics an anisotropic version of the Ohta-Jasnow-Kawasaki theory for the pair scaling function can be used to fit our data.

Anisotropic dynamical scaling in a spin model with competing interactions / Cirillo, Emilio Nicola Maria; G., Gonnella; S., Stramaglia. - In: PHYSICAL REVIEW E. - ISSN 1063-651X. - STAMPA. - 56:5 SUPPL. A(1997), pp. 5065-5068. [10.1103/physreve.56.5065]

Anisotropic dynamical scaling in a spin model with competing interactions

CIRILLO, Emilio Nicola Maria;
1997

Abstract

Results are presented for the kinetics of domain growth of a two-dimensional Ising spin model with competing interactions quenched from a disordered to a striped phase. The domain growth exponents are beta=1/2 and beta=1/3 for single-spin-flip and spin-exchange dynamics, as found in previous simulations. However, the correlation functions measured in the direction parallel and transverse to the stripes are different as suggested by the existence of different interface energies between the ground states of the model. In the case of single-spin-flip dynamics an anisotropic version of the Ohta-Jasnow-Kawasaki theory for the pair scaling function can be used to fit our data.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/123926
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