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Spin-glass splitting in the quantum Ghatak-Sherrington model

Authors
  • Kim, Do-Hyun
Type
Published Article
Publication Date
Apr 08, 2014
Submission Date
Mar 04, 2014
Identifiers
DOI: 10.1103/PhysRevE.87.042127
Source
arXiv
License
Yellow
External links

Abstract

We propose an expanded spin-glass model, called the quantum Ghatak-Sherrington model, which considers spin-1 quantum spin operators in a crystal field and in a transverse field. The analytic solutions and phase diagrams of this model are obtained by using the one-step replica symmetry-breaking ansatz under the static approximation. Our results represent the splitting within one spin-glass (SG) phase depending on the values of crystal and transverse fields. The two separated SG phases, characterized by a density of filled states, show certain differences in their shapes and phase boundaries. Such SG splitting becomes more distinctive when the degeneracy of the empty states of spins is larger than one of their filled states.

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