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 vs. 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.

Spezia, S., Persano Adorno, D., Pizzolato, N., Spagnolo, B. (2013). Enhancement of electron spin lifetime in GaAs crystals: the benefits of dichotomous noise. EUROPHYSICS LETTERS, 104, 47011 [10.1209/0295-5075/104/47011].

Enhancement of electron spin lifetime in GaAs crystals: the benefits of dichotomous noise

PERSANO ADORNO, Dominique;PIZZOLATO, Nicola;SPAGNOLO, Bernardo
2013-01-01

Abstract

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 vs. 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.
2013
Settore FIS/03 - Fisica Della Materia
Spezia, S., Persano Adorno, D., Pizzolato, N., Spagnolo, B. (2013). Enhancement of electron spin lifetime in GaAs crystals: the benefits of dichotomous noise. EUROPHYSICS LETTERS, 104, 47011 [10.1209/0295-5075/104/47011].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/98884
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