6533b854fe1ef96bd12af696
RESEARCH PRODUCT
Enhancement of electron spin lifetime in GaAs crystals: the benefits of dichotomous noise
Nicola PizzolatoBernardo SpagnoloD. Persano AdornoStefano Speziasubject
PhysicsCondensed matter physicsStatistical Mechanics (cond-mat.stat-mech)Condensed Matter - Mesoscale and Nanoscale PhysicsHigh-field and nonlinear effectsGaussianMonte Carlo methodGeneral Physics and AstronomyFOS: Physical sciencesNoise correlationExternal noiseSpin relaxation and scatteringPlateau (mathematics)Noise processes and phenomenaSettore FIS/03 - Fisica Della Materiasymbols.namesakeAmplitudeElectric fieldMesoscale and Nanoscale Physics (cond-mat.mes-hall)symbolsNoise (radio)Condensed Matter - Statistical Mechanicsdescription
The electron spin relaxation process in n-type GaAs crystals driven by a fluctuating electric field is investigated. Two different sources of fluctuations are considered: (i) a symmetric dichotomous noise and (ii) a Gaussian correlated noise. Monte Carlo numerical simulations show, in both cases, an enhancement of the spin relaxation time by increasing the amplitude of the external noise. Moreover, we find that the electron spin lifetime versus the noise correlation time: (i) increases up to a plateau in the case of dichotomous random fluctuations, and (ii) shows a nonmonotonic behaviour with a maximum in the case of bulks subjected to a Gaussian correlated noise.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-01-01 |