Voltage probe of the optically oriented electron spin relaxation
Author(s)
Idrish Miah, M.
Griffith University Author(s)
Year published
2011
Metadata
Show full item recordAbstract
We report here a study of the voltage probe of the electron spin relaxation in zinc-blende semiconductors. Electron spins oriented by a circularly polarized light are dragged by an electric field in transparent devices formed on gallium arsenide. The observed spin polarization-dependent voltage signal (which is a measure of the spin relaxation) is found to decrease about exponentially with the applied electric field. When the spin-oriented electrons are dragged with a high field, a significant decrease in the spin polarization is observed due to an increase in the spin precession frequency of the hot electrons. ...
View more >We report here a study of the voltage probe of the electron spin relaxation in zinc-blende semiconductors. Electron spins oriented by a circularly polarized light are dragged by an electric field in transparent devices formed on gallium arsenide. The observed spin polarization-dependent voltage signal (which is a measure of the spin relaxation) is found to decrease about exponentially with the applied electric field. When the spin-oriented electrons are dragged with a high field, a significant decrease in the spin polarization is observed due to an increase in the spin precession frequency of the hot electrons. It is also found that the signal rationally decreases with increasing crystal temperature. The results are discussed based on the Dyakonov-Perel spin relaxation mechanism.
View less >
View more >We report here a study of the voltage probe of the electron spin relaxation in zinc-blende semiconductors. Electron spins oriented by a circularly polarized light are dragged by an electric field in transparent devices formed on gallium arsenide. The observed spin polarization-dependent voltage signal (which is a measure of the spin relaxation) is found to decrease about exponentially with the applied electric field. When the spin-oriented electrons are dragged with a high field, a significant decrease in the spin polarization is observed due to an increase in the spin precession frequency of the hot electrons. It is also found that the signal rationally decreases with increasing crystal temperature. The results are discussed based on the Dyakonov-Perel spin relaxation mechanism.
View less >
Journal Title
Current Science
Volume
101
Issue
6
Publisher URI
Subject
Atomic, Molecular, Nuclear, Particle and Plasma Physics not elsewhere classified