Ballistic spin transport in exciton gases
نویسندگان
چکیده
منابع مشابه
Quantum Interference Control of Ballistic Magneto- resistance in a Magnetic Nanowire Containing Two Atomic- Size Domain Walls
The magnetoresistance of a one-dimensional electron gas in a metallic ferromagnetic nanowire containing two atomic-size domain walls has been investigated in the presence of spin-orbit interaction. The magnetoresistance is calculated in the ballistic regime, within the Landauer-Büttiker formalism. It has been demonstrated that the conductance of a magnetic nanowire with double domain walls...
متن کاملPolarized interacting exciton gas in quantum wells and bulk semiconductors.
We develop a theory to calculate exciton binding energies of both two-and three-dimensional spin polarized exciton gases within a mean field approach. Our method allows the analysis of recent experiments showing the importance of the polarization and intensity of the excitation light on the exciton lumines-cence of GaAs quantum wells. We study the breaking of the spin degeneracy observed at hig...
متن کاملBallistic spin transport in a two-dimensional electron gas
We explore electrically injected, spin-polarized transport in a ballistic two-dimensional electron gas. We augment the Büttiker-Landauer picture with a simple, but realistic model for spin-selective contacts to describe multimode reservoir-to-reservoir transport of ballistic spin-1/2 particles. Clear and unambiguous signatures of spin transport are established in this regime, for the simplest m...
متن کاملExciton transport in thin-film cyanine dye J-aggregates.
We present a theoretical model for the study of exciton dynamics in J-aggregated monolayers of fluorescent dyes. The excitonic evolution is described by a Monte-Carlo wave function approach which allows for a unified description of the quantum (ballistic) and classical (diffusive) propagation of an exciton on a lattice in different parameter regimes. The transition between the ballistic and dif...
متن کاملNondiffusive excitonic transport in GaAs and the effects of momentum scattering.
Measurements of exciton transport using frequency-domain nearly degenerate four-wave mixing ~NDFWM! show a failure of Fick’s law and near-ballistic excitonic motion for scale lengths less than 10 mm. A solution of the Boltzmann transport equation assuming a simple momentum-changing collision model is in agreement with the observed NDFWM line shapes and apparent subquadratic dependence on invers...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2017