Geometry-assisted topological transitions in spin interferometry
Mesoscale and Nanoscale Physics
2020-01-08 v2
Abstract
We identify a series of topological transitions occurring in electronic spin transport when manipulating spin-guiding fields controlled by the geometric shape of mesoscopic interferometers. They manifest as distinct inversions of the interference pattern in quantum conductance experiments. We establish that Rashba square loops develop weak-(anti)localization transitions (absent in other geometries as Rashba ring loops) as an in-plane Zeeman field is applied. These transitions, boosted by non-adiabatic spin scattering, prove to have a topological interpretation in terms of winding numbers characterizing the structure of spin modes in the Bloch sphere.
Cite
@article{arxiv.1908.01825,
title = {Geometry-assisted topological transitions in spin interferometry},
author = {M. Wang and H. Saarikoski and A. A. Reynoso and J. P. Baltanás and D. Frustaglia and J. Nitta},
journal= {arXiv preprint arXiv:1908.01825},
year = {2020}
}
Comments
revised version: 14 pages, 4 figures, 9 pages of Supplementary Material (6 figures)