We have measured highly visible Aharonov-Bohm (AB) oscillations in a ring structure defined by local anodic oxidation on a p-type GaAs heterostructure with strong spin-orbit interactions. Clear beating patterns observed in the raw data can be interpreted in terms of a spin geometric phase. Besides h/e oscillations, we resolve the contributions from the second harmonic of AB oscillations and also find a beating in these h/2e oscillations. A resistance minimum at B=0T, present in all gate configurations, is the signature of destructive interference of the spins propagating along time-reversed paths.
@article{arxiv.0704.1264,
title = {Aharonov-Bohm oscillations in the presence of strong spin-orbit interactions},
author = {Boris Grbic and Renaud Leturcq and Thomas Ihn and Klaus Ensslin and Dirk Reuter and Andreas D. Wieck},
journal= {arXiv preprint arXiv:0704.1264},
year = {2007}
}