17 citations · 39 across the 8 of their papers we have counts for
8 papers
Dynamical localization of a particle coupled to a two-level systems thermal reservoir
A. Villares Ferrer, C. Morais Smith
Using the functional-integral method, we investigate the effect of a two-level systems thermal reservoir on the single particle dynamics. We find that at low temperatures, within t…
Optical conductivity of charge carriers interacting with a two-level systems reservoir
A. Villares Ferrer, A. O. Caldeira, C. Morais Smith
Using the functional-integral method we investigate the effective dynamics of a charged particle coupled to a set of two-level systems as a function of temperature and external ele…
NMR linewidth and Skyrmion localization in quantum Hall ferromagnets
A. Villares Ferrer, R. L. Doretto, A. O. Caldeira
The non-monotonic behavior of the NMR signal linewidth in the 2D quantum Hall system is explained in terms of the interplay between skyrmions localization, due to the influence of…
One dimensional gapless magnons in a single anisotropic ferromagnetic nanolayer
A. Villares-Ferrer, P. F. Farinas, A. O. Caldeira
Gapless magnons in a plane ferromagnet with normal axis anisotropy are shown to exist besides the usual gapped modes that affect spin dependent transport properties only above a fi…
Domain-wall profile in the presence of anisotropic exchange interactions: Effective on-site anisotropy
A. O. Garcia Rodriguez, A. Villares Ferrer, A. O. Caldeira
Starting from a D-dimensional XXZ ferromagnetic Heisenberg model in an hypercubic lattice, it is demonstrated that the anisotropy in the exchange coupling constant leads to a D-dep…
Soliton dynamics in 1D quantum antiferromagnets
A. Villares Ferrer, A. O. Caldeira, A. S. T. Pires
The problem of dissipative motion of solitons in the case of tetramethyl ammonium manganese chloride (TMMC) is studied as a function of the external magnetic field and the temperat…