The role of electron-electron scattering in spin transport

Kamra, Akashdeep; Ghosh, Bahniman

doi:10.1063/1.3532042

Cited by 12 publications

(11 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To model electronic and spin dynamics in GaAs and to estimate the spin relaxation time, we employ the ensemble Monte Carlo method [ 3 , 11 , 12 ]. This is a semiclassical method in that the simulation has both classical and quantum features.…”

Section: Ensemble Monte Carlo Methodsmentioning

confidence: 99%

“…Very recently, the ensemble Monte Carlo (EMC) method has been equipped for dealing with spin transport [ 10 – 12 ]. EMC is a stochastic method devised to solve numerically the Boltzmann equation for charge transport in semiconductors [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

“…Very recently, the ensemble Monte Carlo (EMC) method has been equipped for dealing with spin transport [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Spin Relaxation in GaAs: Importance of Electron-Electron Interactions

et al. 2014

View full text Add to dashboard Cite

We study spin relaxation in n-type bulk GaAs, due to the Dyakonov-Perel mechanism, using ensemble Monte Carlo methods. Our results confirm that spin relaxation time increases with the electronic density in the regime of moderate electronic concentrations and high temperature. We show that the electron-electron scattering in the non-degenerate regime significantly slows down spin relaxation. This result supports predictions by Glazov and Ivchenko. Most importantly, our findings highlight the importance of many-body interactions for spin dynamics: we show that only by properly taking into account electron-electron interactions within the simulations, results for the spin relaxation time-with respect to both electron density and temperature-will reach good quantitative agreement with corresponding experimental data. Our calculations contain no fitting parameters.

show abstract

Section: Ensemble Monte Carlo Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spin Relaxation in GaAs: Importance of Electron-Electron Interactions

et al. 2014

View full text Add to dashboard Cite

show abstract

“…As a showcase, in this paper we will apply our DM dynamics methodology to investigate ultrafast spin dynamics of GaAs, which has broad interest in spintronics over past decades 2,[28][29][30][31] and more recently [32][33][34] due to its long spin lifetime, especially in the n-doped material at relatively low temperature 28 . Despite various experimental 28,29,[35][36][37] and theoretical 2,30,31,[38][39][40] studies previously, the dominant spin relaxation mechanism of bulk GaAs under various temperatures and doping levels remains unclear. For example, Refs.…”

Section: Introductionmentioning

confidence: 99%

Ab initio Ultrafast Spin Dynamics in Solids

Xu,

Habib,

Sundararaman

et al. 2020

Preprint

View full text Add to dashboard Cite

Spin relaxation and decoherence is at the heart of spintronics and spin-based quantum information science. Currently, theoretical approaches that can accurately predict spin relaxation of general solids including necessary scattering pathways and capable for ns to ms simulation time are urgently needed. We present a first-principles real-time density-matrix approach based on Lindblad dynamics to simulate ultrafast spin dynamics for general solid-state systems. Through the complete firstprinciples descriptions of pump, probe and scattering processes including electron-phonon, electronimpurity and electron-electron scatterings with self-consistent spin-orbit couplings, our method can directly simulate the ultrafast pump-probe measurements for coupled spin and electron dynamics over ns at any temperature and doping levels. We apply this method to a prototypical system GaAs and obtain excellent agreement with experiments. We found that the relative contributions of different scattering mechanisms and phonon modes differ considerably between spin and carrier relaxation processes. In sharp contrast to previous work based on model Hamiltonians, we point out that the electron-electron scattering is negligible at room temperature but becomes very important at low temperatures for spin relaxation in n-type GaAs. Most importantly, we examine the applicable conditions of the commonly-used D'yakonov-Perel' relation, which may break down for individual scattering processes. Our work provides a predictive computational platform for spin relaxation in solids, which has unprecedented potentials for designing new materials ideal for spintronics and quantum information technology.

show abstract

“…Electron scattering is a tool of great importance for exploring the structure of matter [1][2][3][4][5][6]. The most significant example to highlight such importance is perhaps electron microscopy, where electron scattering is the core process [7].…”

Section: Introductionmentioning

confidence: 99%

Quantized form factor shift in the presence of free electron laser radiation

Fratini¹,

Safari²,

Hayrapetyan³

et al. 2014

EPL

View full text Add to dashboard Cite

In electron scattering, the target form factors contribute significantly to the diffraction pattern and carry information on the target electromagnetic charge distribution. Here we show that the presence of electromagnetic radiation, as intense as currently available in Free Electron Lasers, shifts the dependence of the target form factors by a quantity that depends on the number of photons absorbed or emitted by the electron as well as on the parameters of the electromagnetic radiation. As example, we show the impact of intense ultraviolet and soft X-ray radiation on elastic electron scattering by Ne-like Argon ion and by Xenon atom. We find that the shift brought by the radiation to the form factor is in the order of some percent. Our results may open up a new avenue to explore matter with the assistance of laser.

show abstract

The role of electron-electron scattering in spin transport

Cited by 12 publications

References 39 publications

Spin Relaxation in GaAs: Importance of Electron-Electron Interactions

Spin Relaxation in GaAs: Importance of Electron-Electron Interactions

Ab initio Ultrafast Spin Dynamics in Solids

Quantized form factor shift in the presence of free electron laser radiation

Contact Info

Product

Resources

About