title: Aharonov-Bohm oscillations in the presence of strong spin-orbit interactions.
abstract: 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=0 T, present in all gate configurations, is the signature of destructive interference of the spins propagating along time-reversed paths.
authors.affiliation: Solid State Physics Laboratory, ETH Zurich, 8093 Zurich, Switzerland.
authors.forename: Boris
authors.initials: B
authors.lastname: Grbić
authors.forename: Renaud
authors.initials: R
authors.lastname: Leturcq
authors.forename: Thomas
authors.initials: T
authors.lastname: Ihn
authors.forename: Klaus
authors.initials: K
authors.lastname: Ensslin
authors.forename: Dirk
authors.initials: D
authors.lastname: Reuter
authors.forename: Andreas D
authors.initials: AD
authors.lastname: Wieck