40 citations · 88 across the 10 of their papers we have counts for
10 papers
Charge transport in two-dimensional conductors with hybrid three-component plasma
A. D. Levin, V. A. Chitta, Z. D. Kvon +2
Electron--hole plasma in two-dimensional systems has mainly been studied in two limiting cases: degenerate semimetals with parabolic bands and nondegenerate symmetric Dirac systems…
Corbino-Enhanced Supersonic Acoustic-Emission Threshold in a GaAs Two-Dimensional Electron System
A. D. Levin, A. S. Jaroshevich, Z. D. Kvon +5
We report nonlinear differential-resistance measurements in a high-mobility GaAs/AlGaAs two-dimensional electron system patterned in a Corbino geometry. At zero magnetic field, $R_…
Obstacle-Induced Gurzhi Effect and Hydrodynamic Electron Flow in Two-Dimensional Systems
A. D. Levin, G. M. Gusev, V. A. Chitta +5
The viscous flow of electrons in a narrow channel requires both strong electron-electron interactions and no-slip boundary conditions. However, introducing obstacles within the liq…
Bulk and shear viscosities in multicomponent 2D electron system
A. D. Levin, G. M. Gusev, V. A. Chitta +2
We investigated magnetotransport in mesoscopic samples containing electrons from three different subbands in GaAs triple wells. At high temperatures, we observed positive magnetore…
Magnetization of Zn1-xCoxO nanoparticles: single-ion anisotropy and spin clustering
X. Gratens, B. de Abreu Silva, M. I. B. Bernardi +3
The magnetization of Zn1-xCoxO (0.0055 < x < 0.073) nanoparticles has been measured as a function of temperature T (1.7 K < T , 10 K) and for magnetic field up to 65 kOe using a SQ…
Magnetization steps of quintets in the hcp lattice
X. Gratens, V. Chitta
The magnetization steps of quintet clusters, consisting of five identical magnetic ions coupled by isotropic nearest neighbors antiferromagnetic exchange interaction in the hcp lat…
Effects of Reducing Heat Treatment on the Structural and the Magnetic Properties of Mn:ZnO Ceramics
V. M. Almeida Lage, R. T. da Silva, A. Mesquita +4
Polycrystalline bulk Mn:ZnO ceramics with Mn nominal concentrations of 6, 11, 17 and 22 at.% were prepared trough solid-state reaction method and subjected to a heat treatment in r…
Defect Induced Room Temperature Ferromagnetism in High Quality Co-doped ZnO Bulk Samples
M. P. F. de Godoy, X. Gratens, V. A. Chitta +6
The nature of the often reported room temperature ferromagnetism in transition metal doped oxides is still a matter of huge debate. Herein we report on room temperature ferromagnet…
Converting Faraday rotation into magnetization in europium chalcogenides
S. C. P. van Kooten, P. A. Usachev, X. Gratens +4
We present a simple semiclassical model to sustain that in europium chalcogenides (EuX), Faraday rotation (FR) in the transparency gap is proportional to the magnetization of the s…
Ultrafast light switching of ferromagnetism in EuSe
A. B. Henriques, X. Gratens, P. A. Usachev +2
We demonstrate that light resonant with the bandgap forces the antiferromagnetic semiconducor EuSe to enter ferromagnetic alignment in the picosecond time scale. A photon generates…