Semiclassical Monte Carlo simulation studies of spin dephasing in InP and InSb nanowires

• Main Authors: Ashish Kumar, M. W. Akram, Bahniman Ghosh
• Format: Article
• Language: English
• Published: AIP Publishing LLC 2012-03-01
• Series: AIP Advances
• Online Access: http://dx.doi.org/10.1063/1.3694892

We use semiclassical Monte Carlo approach to investigate spin polarized transport in InP and InSb nanowires. D’yakonov-Perel (DP) relaxation and Elliott-Yafet (EY) relaxation are the two main relaxation mechanisms for spin dephasing in III-V channels. The DP relaxation occurs because of bulk inversion asymmetry (Dresselhaus spin-orbit interaction) and structural inversion asymmetry (Rashba spin-orbit interaction). The injection polarization direction studied is that along the length of the channel. The dephasing rate is found to be very strong for InSb as compared to InP which has larger spin dephasing lengths. The ensemble averaged spin components vary differently for both InP and InSb nanowires. The steady state spin distribution also shows a difference between the two III-V nanowires.