23 citations · 69 across the 11 of their papers we have counts for
11 papers
Enhanced domain wall velocity near a ferromagnetic instability
H. B. Brentan, P. F. Farinas
Assuming a Fermi liquid behavior for -conduction electrons, we rewrite the extended Landau-Lifshitz-Gilbert (LLG) equation renormalized by interactions through the Landau parame…
Negative photoconductance in a biased multiquantum well with filter barriers
Anibal T. Bezerra, Marcelo Z. Maialle, Marcos H. Degani +2
In this paper the photon-assisted electron motion in a multiquantum well (MQW) semiconductor heterostructure in the presence of an electric field is investigated. The time-dependen…
Generation and control of spin-polarized photocurrents in GaMnAs heterostructures
Anibal T. Bezerra, Leonardo K. Castelano, Marcos H. Degani +3
Photocurrents are calculated for a specially designed GaMnAs semiconductor heterostructure. The results reveal regions in the infrared range of the energy spectrum in which the pro…
The 'Higgs' amplitude mode in weak ferromagnetic metals
Yi Zhang, Paulo F. Farinas, Kevin S. Bedell
Using Ferromagnetic Fermi liquid theory, Bedell and Blagoev derived the collective low-energy excitations of a weak ferromagnet. They obtained the well-known magnon (Nambu-Goldston…
Terahertz-field induced tunneling current with non-linear effects in a double quantum well coupled to a continuum
Marcelo Z. Maialle, Marcos H. Degani, Justino R. Madureira +1
We have theoretically investigated the tunneling current induced by a terahertz (THz) field applied to an asymmetric double quantum well. The excitation couples an initially locali…
Nonequilibrium interacting electrons in a ferromagnet
Paulo F. Farinas
Dynamics of the magnetization in ferromagnets is examined in the presence of transport electrons allowing the latter to interact. It is found that the existence of inhomogeneities…