10 citations · 15 across the 2 of their papers we have counts for
2 papers
cond-mat.stat-mech2013★ 10 cited
Quantum Spin- Anisotropic Ferromagnetic Heisenberg Model in a Crystal Field: A Variational Approach
Diego da Cunha Carvalho, João Antônio Plascak, Luizdarcy de Matos Castro
A variational approach based on Bogoliubov inequality for the free energy is employed in order to treat the quantum spin- anisotropic ferromagnetic Heisenberg model in the prese…
cond-mat.stat-mech2006★ 5 cited
Free energy variational approach for the classical anisotropic XY model in a crystal field
L. M. Castro, A. S. T. Pires, J. A. Plascak
A variational approach for the free energy is used to study the three-dimensional anisotropic XY model in the presence of a crystal field. The magnetization and the phase diagrams…