We theoretically show that a locally-embedded Rashba interaction acts as a strong pinning center for current-driven domain walls and demonstrate efficient capturing and depinning of the wall using a weak Rashba interaction of the order of 0.01 eV{\AA}. Our discovery is expected to be useful for the highly reliable control of domain walls in racetrack memories.
Cite
@article{arxiv.1608.06044,
title = {Efficient stopping of current-driven domain wall using a local Rashba field},
author = {Gen Tatara and Henri Saarikoski and Chiharu Mitsumata},
journal= {arXiv preprint arXiv:1608.06044},
year = {2016}
}