Use este identificador para citar o ir al link de este elemento: http://hdl.handle.net/1843/54915
Tipo: Artigo de Periódico
Título: Two dimensional compass model with Heisenberg interactions
Autor(es): Antônio Sérgio Teixeira Pires
Resumen: We consider a two dimensional compass model with a next and a next near Heisenberg term. The interactions are of two types: frustrated near neighbor compass interactions of amplitudes Jx and Jy, and next and next near neighbor Heisenberg interactions with exchanges J1 and J2 respectively. The Heisenberg interactions are isotropic in spin space, but the compass interactions depend on the bond direction. The ground state of the pure compass model is degenerated with a complex phase diagram. This degeneracy is removed by the Heisenberg terms leading to the arising of a magnetically ordered phase with a preferred direction. We calculate the phase diagrams at zero temperature for the case where, for J2 = 0, we have an antiferromagnetic ground state. We show that varying the value of J2, a magnetically disordered phase can be reached for small values of the compass interactions. We also calculate the critical temperature for a specified value of parameters.
Asunto: Antiferromagnetismo
Idioma: eng
País: Brasil
Editor: Universidade Federal de Minas Gerais
Sigla da Institución: UFMG
Departamento: ICX - DEPARTAMENTO DE FÍSICA
Tipo de acceso: Acesso Restrito
Identificador DOI: https://doi.org/10.1016/j.jmmm.2017.12.098
URI: http://hdl.handle.net/1843/54915
Fecha del documento: 2018
metadata.dc.url.externa: https://www.sciencedirect.com/science/article/pii/S0304885317320449
metadata.dc.relation.ispartof: Journal of Magnetism and Magnetic Materials
Aparece en las colecciones:Artigo de Periódico

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