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Surface phase diagrams of the Ising with a transverse field

1984; IOP Publishing; Volume: 17; Issue: 18 Linguagem: Inglês

10.1088/0022-3719/17/18/012

ISSN

1747-3802

Autores

E. F. Sarmento, I. Tamura, Luiz Eduardo Oliveira, T. Kaneyoshi,

Tópico(s)

Quantum many-body systems

Resumo

Within the framework of the standard mean-field approximation and an effective-field theory with correlation the authors discuss the phase diagram for surface ordering in a semi-infinite Ising spin system with a transverse field. Although analytically simple, the effective-field theory is superior to the standard mean-field approximation. A certain characteristic behaviour is found for the surface ordering both in the standard mean-field approximation and in the effective-field theory.

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