ON THE EFFECT OF ELECTRON-PHONON INTERACTION AND PHONON FIELD FLUCTUATIONS ON RELAXATION OF THE CONDUCTION ELECTRON SPIN TORQUE IN NONMAGNETIC CRYSTALS. I |
| 4 | |
| 2014 |
| scientific article | 538.935 | ||
| 12-27 | spintronics, spin noise, open quantum systems, stochastic equation, phonon damping, spin-orbit interaction |
| The article investigates the effect of electron-phonon interaction and phonon field fluctuations on the relaxation of the conduction electron spin angular momentum in nonmagnetic centrosymmetric crystals taking into account the spin-orbit interaction. In the approximation of the Gaussian statistics of phonon field variables, a stochastic equation is obtained which describes Brownian motion and the spin angular momentum relaxation in the most general non-Markov case accounting for the memory effects. The fluctuation sources and phonon damping coefficients are defined. In the Markovian limit case, the microscopic Bloch equations are derived for the projections of the spin angular momentum, and the non-Markovian corrections related to the memory effects are also determined. The validity conditions for the obtained equations are formulated. |
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