52 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Instituto Federal da BahiaBR8 papers
- Universidad de Santiago de ChileCL8 papers
- Universidade Federal de ViçosaBR8 papers
- Center for the Development of Nanoscience and NanotechnologyCL4 papers
- University of ChileCL4 papers
- Laboratoire de Physique Théorique et ModélisationFR2 papers
- Pontificia Universidad Católica de ChileCL2 papers
- Universidade de BrasíliaBR2 papers
- Universidade Federal do PiauíBR2 papers
- Universidade SalvadorBR2 papers
- Aix-Marseille UniversitéFR1 paper
- Centre National de la Recherche ScientifiqueFR1 paper
16 papers
A DFT Study on the Electronic Structure of In-Plane Heterojunctions of Graphene and Hexagonal Boron Nitride Nanoribbons
Ramiro M. dos Santos, William F. Giozza, Rafael T. de Sousa Júnior +3
The structural similarity between hexagonal boron nitride (h-BN) and graphene nanoribbons allows for the formation of heterojunctions with small chain stress. The combination of th…
Structural and Electronic Properties of Defective AlN/GaN Hybrid Nanostrutures
Ramiro Marcelo dos Santos, Acrisio Lins de Aguiar, Jonathan da Rocha Martins +3
Due to the wide range of possible applications, atomically thin two-dimensional heterostructures have attracted much attention. In this work, using first-principles calculations, w…
Evaluating the Applicability of Bandwidth Allocation Models for EON Slot Allocation
Rafael F. Reale, Romildo M. S. Bezerra, Gilvan Duraes +3
Bandwidth Allocation Models (BAMs) configure and handle resource allocation (bandwidth, LSPs, fiber, slots) in networks in general (IP/MPLS/DS-TE, optical domain, other). In this p…
Oscillatory behavior of the domain wall dynamics in a curved cylindrical magnetic nanowire
R. Moreno, V. L. Carvalho-Santos, A. P. Espejo +3
Understanding the domain wall dynamics is an important issue in modern magnetism. Here we present results of domain wall displacement in curved cylindrical nanowires at a constant…
Vortex-antivortex pairs induced by curvature in toroidal nanomagnets
Smiljan Vojkovic, Vagson L. Carvalho-Santos, Jakson M. Fonseca +1
We show that the curvature of nanomagnets can be used to induce chiral textures in the magnetization field. Among the phenomena related to the interplay between geometry and magnet…
Magnetization ground state and reversal modes of magnetic nanotori
Smiljan Vojkovic, Álvaro S. Núñez, Dora Altbir +1
In this work, and by means of micromagnetic simulations, we study the magnetic properties of toroidal nanomagnets. The magnetization ground state for different values of the aspect…
Spin wave vortex from the scattering on Bloch point solitons
Vagson L. Carvalho-Santos, Ricardo Gabriel Elías, Alvaro S. Núñez
The interaction of a spin wave with a stationary Bloch point is studied. The topological non-trivial structure of the Bloch point manifests in the propagation of spin waves endowin…
Berry phases and zero-modes in toroidal topological insulator
J. M. Fonseca, V. L. Carvalho-Santos, W. A. Moura-Melo +1
An effective Hamiltonian describing the surface states of a toroidal topological insulator is obtained, and it is shown to support both bound-states and charged zero-modes. Actuall…
Spin waves scattering on a Bloch point
R. G. Elías, V. L. Carvalho-Santos, A. S. Núñez +1
We show that, after a transformation, the dynamics of linear perturbations (spin waves) around a singular Bloch point soliton is formally equivalent to a quantum system of an elect…
Curvature-induced changes in the magnetic energy of vortices and skyrmions in paraboloidal nanoparticles
V. L. Carvalho-Santos, R. G. Elias, J. M. Fonseca +1
Curvature effects are important for a proper description of the properties of magnetic systems. In this paper the exchange and dipolar energy of vortices on a paraboloidal shell is…
Topological magnetic solitons on a paraboloidal shell
P. S. C. Vilas-Boas, R. G. Elias, D. Altbir +2
We study the influence of curvature on the exchange energy of skyrmions and vortices on a paraboloidal surface. It is shown that such structures appear as excitations of the Heisen…
Stability of skyrmions on curved surfaces in the presence of a magnetic field
V. L. Carvalho-Santos, R. G. Elias, D. Altbir +1
We study the stability and energetics associated to skyrmions appear- ing as excitations on curved surfaces. Using a continuum model we show that the presence of cylindrically radi…
Topological spin excitations induced by an external magnetic field coupled to a surface with rotational symmetry
V. L. Carvalho-Santos, R. Dandoloff
We study the Heisenberg model in an external magnetic field on curved surfaces with rotational symmetry. The Euler-Lagrange static equations, derived from the Hamiltonian lead to t…
Coupling between magnetic field and curvature in Heisenberg spins on surfaces with rotational symmetry
Vagson L. Carvalho-Santos, Rossen Dandoloff
We study the nonlinear -model in an external magnetic field applied on curved surfaces with rotational symmetry. The Euler-Lagrange equations derived from the Hamiltonian yield…
On geometry-dependent vortex stability and topological spin excitations on curved surfaces with cylindrical symmetry
Vagson L. Carvalho-Santos, Felipe A. Apolonio, Nemésio M. Oliveira-Neto
We study the Heisenberg Model on cylindrically symmetric curved surfaces. Two kinds of excitations are considered. The first is given by the isotropic regime, yielding the sine-Gor…
Ground-state configurations in ferromagnetic nanotori
Vagson L. Carvalho-Santos, Winder A. Moura-Melo, Afranio R. Pereira
Magnetization ground states are studied in toroidal nanomagnets. The energetics associated to the ferromagnetic, vortex and onion-like configurations are explicitly computed. The a…