279 citations
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26 papers · 1 filter
Discontinuous transitions can survive to quenched disorder in a 2-dimensional nonequilibrium system
Minos A. Neto, E. Brigatti
We explore the effects that quenched disorder has on discontinuous nonequilibrium phase transitions into absorbing states. We focus our analysis on the Naming Game model, a nonequi…
Ferromagnetic phases due to competing short- and long-range interactions in the spin-S Blume-Capel model
Octavio Daniel Rodriguez Salmon, Minos Adão Neto, Francisco Dinóla Neto +2
We broaden the study of the statistical physics of the spin- Blume-Capel model with ferromagnetic mean-field interactions in competition with short-range antiferromagnetic i…
Spin-1/2 anisotropic Heisenberg antiferromagnet with Dzyaloshinskii-Moriya interaction via mean-field approximation
Walter E. F. Parente, J. T. M. Pacobahyba, Minos A. Neto +2
The spin-1/2 anisotropic Heisenberg model with antiferromagnetic exchange interactions in the presence of a external magnetic field and a Dzyaloshinskii-Moriya interaction is studi…
First-order phase transition by a spin-flip potential in BCS superconductivity
Octavio D. Rodriguez Salmon, Igor Tavares Padilha, Francisco Dinóla Neto
A spin-flip potential is introduced in a BCS Hamiltonian in order to study a possible thermodynamic effect that might be caused by the addition of a magnetic impurity in a supe…
Phase transition induced for external field in tree-dimensional isotropic Heisenberg antiferromagnet
Minos A. Neto, J. Roberto Viana, Octavio D. R. Salmon +2
In this paper, we report mean-field and effective-field renormalization group calculations on the isotropic Heisenberg antiferromagnetic model under a longitudinal magnetic field.…
Multicritical behavior of the two-dimensional transverse Ising metamagnet in a longitudinal magnetic field
Denise A. do Nascimento, Josefa T. Pacobahyba, Minos A. Neto +2
Magnetic phenomena of the superantiferromagnetic Ising model in both uniform longitudinal () and transverse () magnetic fields are studied by employing a mean-field variation…