TY - JOUR
T1 - EFFECT OF A FLUCTUATING ELECTRIC FIELD ON ELECTRON SPIN DEPHASING TIME IN III–V SEMICONDUCTORS
AU - Spagnolo, Bernardo
AU - Spezia, Stefano
AU - Persano Adorno, Dominique
AU - Pizzolato, Nicola
PY - 2012
Y1 - 2012
N2 - We investigate the electron spin dephasing in low n-doped GaAs semiconductorbulks driven by a correlated fluctuating electric field. The electrondynamics is simulated by a Monte Carlo procedure which keeps intoaccount all the possible scattering phenomena of the hot electrons in themedium and includes the evolution of spin polarization. Spin relaxationtimes are computed through the D’yakonov–Perel process, which is theonly relevant relaxation mechanism in zinc-blende semiconductors. Thedecay of initial spin polarization of conduction electrons is calculated fordifferent values of field strength, noise intensity and noise correlation time.For values of noise correlation time comparable to the spin lifetime of thesystem, we find that spin relaxation times are significantly affected by theexternal noise. The effect increases with the noise amplitude. Moreover,for each value of the noise amplitude, a nonmonotonic behaviour of spinrelaxation time as a function of the noise correlation time is found.
AB - We investigate the electron spin dephasing in low n-doped GaAs semiconductorbulks driven by a correlated fluctuating electric field. The electrondynamics is simulated by a Monte Carlo procedure which keeps intoaccount all the possible scattering phenomena of the hot electrons in themedium and includes the evolution of spin polarization. Spin relaxationtimes are computed through the D’yakonov–Perel process, which is theonly relevant relaxation mechanism in zinc-blende semiconductors. Thedecay of initial spin polarization of conduction electrons is calculated fordifferent values of field strength, noise intensity and noise correlation time.For values of noise correlation time comparable to the spin lifetime of thesystem, we find that spin relaxation times are significantly affected by theexternal noise. The effect increases with the noise amplitude. Moreover,for each value of the noise amplitude, a nonmonotonic behaviour of spinrelaxation time as a function of the noise correlation time is found.
KW - Distribution theory and Monte Carlo studies
KW - High-field and nonlinear effects
KW - Noise processes and phenomena
KW - Spin relaxation and scattering
KW - Distribution theory and Monte Carlo studies
KW - High-field and nonlinear effects
KW - Noise processes and phenomena
KW - Spin relaxation and scattering
UR - http://hdl.handle.net/10447/63085
UR - http://th-www.if.uj.edu.pl/acta/vol43/pdf/v43p1191.pdf
M3 - Article
VL - 43
SP - 1191
EP - 1201
JO - Acta Physica Polonica B
JF - Acta Physica Polonica B
SN - 0587-4254
ER -