Monte-Carlo simulation studies of the effect of temperature and diameter variation on spin transport in Ⅱ–Ⅵ semiconductor nanowires

We have analyzed the spin transport behaviour of four Ⅱ–Ⅵ semiconductor nanowires by simulating spin polarized transport using a semi-classical Monte-Carlo approach. The different scattering mechanisms considered are acoustic phonon scattering, surface roughness scattering, polar optical phonon scattering, and spin flip scattering. The Ⅱ–Ⅵ materials used in our study are CdS, CdSe, ZnO and ZnS. The spin transport behaviour is first studied by varying the temperature(4–500 K) at a fixed diameter of 10 nm and also by varying the diameter(8–12 nm) at a fixed temperature of 300 K. For Ⅱ–Ⅵ compounds, the dominant mechanism is for spin relaxation;D'yakonov Perel and Elliot Yafet have been actively employed in the first order model to simulate the spin transport.The dependence of the spin relaxation length(SRL) on the diameter and temperature has been analyzed.