Search Results - "Costa, B. V."

The Fully Frustrated XY Model Revisited: A New Universality Class by Lima, A. B., Mól, L. A. S., Costa, B. V.

“…The two-dimensional (2 d ) fully frustrated Planar Rotator model on a square lattice has been the subject of a long controversy due to the simultaneous Z 2 and…”
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Does access to healthy food vary according to socioeconomic status and to food store type? an ecologic study by Costa, B V L, Menezes, M C, Oliveira, C D L, Mingoti, S A, Jaime, P C, Caiaffa, W T, Lopes, A C S

“…The food environment can influence opportunities and barriers to food access. This study aimed to investigate whether access to healthy foods varies according…”
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Spin transport in the two-dimensional quantum disordered anisotropic Heisenberg model by Lima, L.S., Pires, A.S.T., Costa, B.V.

“…We use the self consistent harmonic approximation together with the Linear Response Theory to study the effect of nonmagnetic disorder on spin transport in the…”
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The phase transition in the anisotropic Heisenberg model with long range dipolar interactions by Mól, L.A.S., Costa, B.V.

“…In this work we have used extensive Monte Carlo calculations to study the planar to paramagnetic phase transition in the two-dimensional anisotropic Heisenberg…”
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Dynamical behavior of vortices in thin film magnetic systems by Costa, B.V., Lima, A.B.

“…The origin of the central peak in the neutron scattering function, C(q→,ω), for the classical two-dimensional anisotropic Heisenberg model has been a puzzle…”
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Petal micromorphology and its relationship to pollination by Costa, V B S, Pimentel, R M M, Chagas, M G S, Alves, G D, Castro, C C

“…The characteristics of petal epidermal conical cells affect the quality of the signals perceived by various pollinators. This study aimed to identify…”
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The influence of magnetic impurities in the vortex core dynamics in magnetic nano-disks by Silva, J.H., Toscano, D., Sato, F., Coura, P.Z., Costa, B.V., Leonel, S.A.

“…In this work we have used spin dynamics simulations to study the gyrotropic frequency behavior in nano-disks of Permalloy with magnetic impurities. We consider…”
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Magnetic behavior of a nano-disk constrained in an antiferromagnetic substrate by Rocha, J.C.S., Costa, B.V., Coura, P.Z., Leonel, S.A., Dias, R.A.

“…In this work we report a numerical Monte Carlo study of the behavior of a magnetic nano-disk put over an antiferromagnetic substrate. Three approaches were…”
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Determining the Phase Diagram of the 3D Quenched ±J Ising Model Using the Zeros of the Energy Probability Distribution by Figueiredo, T. P., Costa, B. V.

“…The two-dimensional Ising model with disorder in the spin-spin interactions is studied using the zeros of the energy probability distribution ( EPD ) to obtain…”
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Novel ferroelectric phase in bulk BaO obtained by application of anisotropic strain by Nascimento, V. B., da Costa, B. V., Rino, J. P.

“…Ferroelectricity is expected to be observed in alkaline earth metal oxides (BaO, MgO, CaO, and SrO) with the application of adequate strain, according to…”
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Using the Energy Probability Distribution Zeros to Obtain the Critical Properties of the Two-Dimensional Anisotropic Heisenberg Model by de Souza, G. B. G., Costa, B. V.

“…In this paper, we present a Monte Carlo study of the critical behavior of the easy axis anisotropic Heisenberg spin model in two dimensions. Based on the…”
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When Science Is "Another World": Relationships between Worlds of Family, Friends, School, and Science by Costa, Victoria B

“…The purpose of this article is two-fold: (1) to describe a model for understanding how students' responses to science are related to the degree of congruency…”
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Pushing the Limits of EPD Zeros Method by Rodrigues, R. G. M., Costa, B. V., Mól, L. A. S.

“…The use of partition function zeros in the study of phase transitions is growing in the last decade mainly due to improved numerical methods as well as novel…”
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Phase diagrams of a two-dimensional Heisenberg antiferromagnet with single-ion anisotropy by Costa, B.V., Pires, A.S.T.

“…A two-dimensional Heisenberg antiferromagnet with a single-ion anisotropy is studied in the presence of a uniform magnetic field along the easy axis. The…”
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Dynamics of the vortex core in magnetic nanodisks with a ring of magnetic impurities by Toscano, D., Leonel, S. A., Coura, P. Z., Sato, F., Dias, R. A., Costa, B. V.

“…In this work, we used numerical simulations to study the effect of a ring of magnetic impurities on the vortex core dynamics in nanodisks of Permalloy. The…”
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A New Algorithm to Study the Critical Behavior of Topological Phase Transitions by Costa, B. V., Mól, L. A. S., Rocha, J. C. S.

“…Topological phase transitions such as the Berezinskii-Kosterlitz-Thouless (BKT) transition are difficult to characterize due to the difficulty in defining an…”
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Molecular dynamics study of the copper cluster deposition on a Cu(0 1 0) surface by Resende, F.J., Costa, B.V.

“…The deposition of copper cluster on the Cu(0 1 0) surface is studied by molecular dynamics simulation. We used a many-body potential based on the tight-binding…”
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Phase diagram of the 3D quantum anisotropic XY model—A quantum Monte Carlo calculation by Guimarães, M., Costa, B.V., Pires, A.S.T., Souza, A.

“…In this work we apply the stochastic series expansion quantum Monte Carlo method to study the quantum phase transition of the spin 1 three-dimensional XY model…”
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The fast simulated annealing algorithm applied to the search problem in LEED by Nascimento, V.B., de Carvalho, V.E., de Castilho, C.M.C., Costa, B.V., Soares, E.A.

“…In this work we present new results obtained from the application of the fast simulated algorithm (FSA) to the surface structure determination of the Ag(1 1 0)…”
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Monte Carlo and spin dynamics simulation of the fully frustrated anisotropic two-dimensional Heisenberg model by Lima, A.B, Costa, B.V

“…Using Monte Carlo and spin dynamics techniques we investigate the critical behavior of the classical three component anisotropic Heisenberg model in two…”
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