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Now showing items 11-18 of 18
Theory of weak localization in ferromagnetic (Ga,Mn)As
(American Physical Society, 2009)
We study quantum interference corrections to the conductivity in (Ga,Mn)As ferromagnetic semiconductors using a model with disordered valence-band holes coupled to localized Mn moments through a p-d kinetic-exchange ...
Microscopic mechanism of the noncrystalline anisotropic magnetoresistance in (Ga,Mn)As
(American Physical Society, 2009)
Starting with a microscopic model based on the Kohn-Luttinger Hamiltonian and kinetic p-d exchange combined with Boltzmann formula for conductivity we identify the scattering from magnetic Mn combined with the strong ...
Response of GaAs to fast intense laser pulses
(American Physical Society, 1998)
Motivated by recent experiments, we have performed simulations which show in detail how the electrons and ions in GaAs respond to fast intense laser pulses (with durations of order 100 fs and intensities of order 1-10 ...
Physical limits of the ballistic and nonballistic spin-field-effect transistor: Spin dynamics in remote-doped structures
(American Physical Society, 2005)
We investigate the spin dynamics and relaxation in remotely doped two dimensional electron systems where the dopants lead to random fluctuations of the Rashba spin-orbit coupling. Due to the resulting random-spin precession, ...
Modeling of diffusion of injected electron spins in spin-orbit coupled microchannels
(American Physical Society, 2010)
We report on a theoretical study of spin dynamics of an ensemble of spin-polarized electrons injected in a diffusive microchannel with linear Rashba and Dresselhaus spin-orbit coupling. We explore the dependence of the ...
Local control of magnetocrystalline anisotropy in (Ga,Mn)As microdevices: Demonstration in current-induced switching
(American Physical Society, 2007)
The large saturation magnetization in conventional dense moment ferromagnets offers a flexible means of manipulating the ordered state through demagnetizing shape anisotropy fields, but these dipolar fields, in turn, limit ...
Manifestation of the spin Hall effect through charge-transport in the mesoscopic regime
(American Physical Society, 2004)
We study theoretically the manifestation of the spin Hall effect in a two-dimensional electronic system with Rashba spin-orbit coupling via dc-transport measurements in realistic mesoscopic H-shape structures. The ...
Second-order susceptibility from a tight-binding Hamiltonian
(American Physical Society, 1998)
Using a new formalism that modifies a tight-binding Hamiltonian to include interaction with a time-dependent electromagnetic field, we have obtained an analytical expression for the second-order susceptibility. This ...