Geometry-assisted topological transitions in spin interferometry
arXiv:1908.01825 · doi:10.1103/PhysRevLett.123.266804
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.
revised version: 14 pages, 4 figures, 9 pages of Supplementary Material (6 figures)
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- Spin-texture topology in curved circuits driven by spin-orbit interactions
- A quantum-network approach to spin interferometry driven by Abelian and non-Abelian fields
- Qubit transformations on Rashba ring with periodic potential
- Magnetic switching of spin-scattering centers in Dresselhaus [110] circuits
- Parallel spin transport and holonomy in non-Euclidean curved circuits on a spherical two-dimensional electron gas