16 citations · 50 across the 7 of their papers we have counts for
7 papers
Many-body effects on the ringlike structures in two-subband wells
Gerson J. Ferreira, Henrique J. P. Freire, J. Carlos Egues
The longitudinal resistivity of two-dimensional electron gases formed in wells with two subbands displays ringlike structures when plotted in a density--magnetic-field dia…
Friedel oscillations in one-dimensional metals: from Luttinger's theorem to the Luttinger liquid
Daniel Vieira, Henrique J. P. Freire, V. L. Campo +1
Charge density and magnetization density profiles of one-dimensional metals are investigated by two complementary many-body methods: numerically exact (Lanczos) diagonalization, an…
Simple implementation of complex functionals: scaled selfconsistency
Matheus P. Lima, Luana S. Pedroza, Antonio J. R. da Silva +4
We explore and compare three approximate schemes allowing simple implementation of complex density functionals by making use of selfconsistent implementation of simpler functionals…
Ringlike structures in the density--magnetic-field diagram of two-subband quantum Hall systems
Gerson J. Ferreira, Henrique J. P. Freire, J. Carlos Egues
Motivated by recent experiments [Zhang \textit{et al.}, Phys. Rev. Lett. \textbf{95}, 216801 (2005) and Ellenberger \textit{et al.}, cond-mat/0602271] reporting novel ringlike stru…
Hysteretic resistance spikes in quantum Hall ferromagnets without domains
Henrique J. P. Freire, J. Carlos Egues
We use spin-density-functional theory to study recently reported hysteretic magnetoresistance ρ_{xx} spikes in Mn-based 2D electron gases [Jaroszyński et al. Phys. Rev. Lett. (2002…
"Reservoir model" for shallow modulation-doped digital magnetic quantum wells
Henrique J. P. Freire, J. Carlos Egues
Digital Magnetic Heterostructures (DMH) are semiconductor structures with magnetic monolayers. Here we study electronic and magneto-transport properties of shallow modulation-doped…
Subband structure of II-VI modulation-doped magnetic quantum wells
Henrique J. P. Freire, J. Carlos Egues
Here we investigate the spin-dependent subband structure of newly-developed Mn-based modulation-doped quantum wells. In the presence of an external magnetic field, the s-d exchange…