227 citations · 7.4k across the 275 of their papers we have counts for
10 papers · 1 filter
Configurational Entropy for Skyrmion-like Magnetic Structures
D. Bazeia, D. C. Moreira, E. I. B. Rodrigues
In this work we explore the relationship between two ideas recently introduced in the literature. The first one deals with a quantity related to the informational contents of solut…
Semi-Compact Skyrmion-like Structures
D. Bazeia, E. I. B. Rodrigues
We study three distinct types of planar, spherically symmetric and localized structures, one of them having non-topological behavior and the two others being of topological nature.…
Topological Excitations in Magnetic Materials
D. Bazeia, M. M. Doria, E. I. B. Rodrigues
In this work we propose a new route to describe topological excitations in magnetic systems through a single real scalar field. We show here that spherically symmetric structures i…
Topological strength of magnetic skyrmions
D. Bazeia, J. G. G. S. Ramos, E. I. B. Rodrigues
We deal with magnetic structures that attain integer and half-integer skyrmion numbers. We model and solve the problem analytically, and show how the solutions appear in materials…
Universal Braess paradox in open quantum dots
A. L. R. Barbosa, D. Bazeia, J. G. G. S. Ramos
We present analytical and numerical results that demonstrate the presence of the Braess paradox in chaotic quantum dots. The paradox that we identify, originally perceived in class…
Generalized correlation functions for conductance fluctuations and the mesoscopic spin Hall effect
J. G. G. S. Ramos, A. L. R. Barbosa, D. Bazeia +2
We study the spin-Hall conductance fluctuations in ballistic mesoscopic systems. We obtain universal expressions for the spin and charge current fluctuations, cast in terms of curr…
Conductance peaks in open quantum dots
J. G. G. S. Ramos, D. Bazeia, M. S. Hussein +1
We present a simple measure of the conductance fluctuations in open ballistic chaotic quantum dots, extending the number of maxima method originally proposed for the statistical an…
Presence of asymmetric noise in multi-terminal chaotic cavities
A. L. R. Barbosa, J. G. G. S. Ramos, D. Bazeia
This work deals with chaotic quantum dot connected to two and four leads. We use standard diagrammatic procedure to integrate on the unitary group, to study the main term in the se…
Spin Accumulation Encoded in Electronic Noise for Mesoscopic Billiards with Finite Tunneling Rates
J. G. G. S. Ramos, A. L. R. Barbosa, D. Bazeia +1
We study the effects of spin accumulation (inside reservoirs) on electronic transport with tunneling and reflections at the gates of a quantum dot. Within the stub model, the calcu…
Crossover of thermal to shot noise in chaotic cavities
A. L. R. Barbosa, J. G. G. S. Ramos, D. Bazeia
We study the crossover between thermal and shot-noise power in a chaotic quantum dot in the presence of non-ideal contacts at finite temperature. The result explicitly demonstrates…