34 citations · 148 across the 9 of their papers we have counts for
10 papers
An Abelian Higgs model for disclinations in nematics
A. de Pádua Santos, F. Moraes, F. A. N. Santos +1
Topological defects in elastic media may be described by a geometric field akin to three-dimensional gravity. From this point of view, disclinations are line defects of zero width…
Magnetic and geometric effects on the electronic transport of metallic nanotubes
Felipe Serafim, Fernando A. N. Santos, Jonas R. F. Lima +3
The investigation of curved low-dimensional systems is a topic of great research interest. Such investigations include two-dimensional systems with cylindrical symmetry. In this wo…
Why we should use Topological Data Analysis in Ageing: towards defining the "Topological shape of ageing"
Tamàs Fülöp, Mathieu Desroches, Fernando Antônio Nóbrega Santos +1
Living systems are subject to the arrow of time; from birth, they undergo complex transformations (self-organization) in a constant battle for survival, but inevitably ageing and d…
Position-dependent mass effects in the electronic transport of two-dimensional quantum systems
Felipe Serafim, F. A. N. Santos, Jonas R. F. Lima +2
In this work, we investigate the electronic transport properties of curved two-dimensional quantum systems with a position-dependent mass (PDM). We found the Schrödinger equation f…
Geometrical optics limit of phonon transport in a channel of disclinations
Sébastien Fumeron, Bertrand Berche, Fernando Moraes +2
The presence of topological defects in a material can modify its electrical, acoustic or thermal properties. However, when a group of defects is present, the calculations can becom…
Using torsion to manipulate spin currents
Sébastien Fumeron, Bertrand Berche, Ernesto Medina +2
We address the problem of quantum particles moving on a manifold characterised by the presence of torsion along a preferential axis. In fact, such a torsion may be taylored by the…
Topological Approach to Microcanonical Thermodynamics and Phase Transition of Interacting Classical Spins
F A N Santos, L C B da Silva, M D Coutinho-Filho
We propose a topological approach suitable to establish a connection between thermodynamics and topology in the microcanonical ensemble. Indeed, we report on results that point to…
Propagation of acoustic waves in a von-Kármán vortex street like configuration of disclinations
Sébastien Fumeron, Bertrand Berche, Fernando Moraes +2
We show that a simple model of 1D array of topological defects in a crystalline environment is able to guide acoustic waves, depending on the angle of the incident wave. We comment…
Geometric effects in the electronic transport of deformed nanotubes
Fernando Santos, Sébastien Fumeron, Bertrand Berche +1
Quasi-two-dimensional systems may exibit curvature, which adds three-dimensional influence to their internal properties. As shown by da Costa \cite{dacosta}, charged particles movi…
Optics near an hyperbolic defect
Sébastien Fumeron, Bertrand Berche, Fernando Santos +2
We examine the properties of a new family of defects called hyperbolic disclinations, and discuss their possible use for the design of perfect optical absorbers. In hyperbolic meta…