6 papers
Finite size analysis of a two-dimensional Ising model within a nonextensive approach
N. Crokidakis, D. O. Soares-Pinto, M. S. Reis +3
In this work we present a thorough analysis of the phase transitions that occur in a ferromagnetic 2D Ising model, with only nearest-neighbors interactions, in the framework of the…
Entanglement temperature in molecular magnets composed of S-spin dimers
D. O. Soares-Pinto, A. M. Souza, R. S. Sarthour +5
In the present work, we investigate the quantum thermal entanglement in molecular magnets composed of dimers of spin , using an Entanglement Witness built from measurements of m…
Entanglement and Bell's inequality violation above room temperature in metal carboxylates
A. M. Souza, D. O. Soares-Pinto, R. S. Sarthour +4
In the present work we show that a special family of materials, the metal carboxylates, may have entangled states up to very high temperatures. From magnetic susceptibility measure…
Phase diagram of a 2D Ising model within a nonextensive approach
D. O. Soares-Pinto, I. S. Oliveira, M. S. Reis
In this work we report Monte Carlo simulations of a 2D Ising model, in which the statistics of the Metropolis algorithm is replaced by the nonextensive one. We compute the magnetiz…
Magnetic behavior of a non-extensive S-spin system: possible connections to manganites
M. S. Reis, J. P. Araujo, V. S. Amaral +2
We analyzed the magnetic behavior of a S-spin system within framework of the Tsallis nonextensive statistics, employing the normalized approach. Unusual properties on magnetization…
Evidences for Tsallis non-extensivity on CMR manganites
M. S. Reis, J. C. C. Freitas, M. T. D. Orlando +2
We found, from the analysis of vs. curves of some manganese oxides (manganites), that these systems do not follow the traditional Maxwell-Boltzmann statistics, but the Tsal…