Monte Carlo simulation of spin relaxation in core-shell nanowires of dilute magnetic semiconductors

• We study spin transport in DMS stand-alone nanowire using SC-Monte Carlo Method.
• We study spin transport in DMS core-shell nanowire using SC-Monte Carlo Method.
• Four DMS materials CdMnS, CdMnSe, ZnMnSe and CdMnTe are used for study.
• D'yakonov-Perel and Elliot-Yafet mechanisms used in spin transport simulation.
• The spin relaxation length dependent upon the core diameter in core-shell nanowire.

Spin transport behaviour in stand-alone and core-shell nanowire (NW) structure composed of dilute magnetic semiconductor (DMS) has been analysed using Semi-classical Monte Carlo approach. Inspired by recent attempts on exploring various factors instrumental in determining the spin dynamics, we have employed four DMS materials, namely, CdMnS, CdMnSe, ZnMnSe and CdMnTe for our study. Dominant mechanisms for spin relaxation, D'yakonov-Perel and Elliot-Yafet, have been actively employed in our heuristic model to simulate the spin transport. The dependence of spin relaxation length (SRL) on the diameter of the core has been observed and explained. The first order calculations used to develop the model shows the superiority of the core-shell structure over stand-alone nanowire (NW) structure in terms of spin transport.