Abstract
We have measured highly visible Aharonov-Bohm (AB) oscillations in a ring structure defined by local anodic oxidation on a -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 oscillations, we resolve the contributions from the second harmonic of AB oscillations and also find a beating in these oscillations. A resistance minimum at , present in all gate configurations, is the signature of destructive interference of the spins propagating along time-reversed paths.
- Received 10 April 2007
DOI:https://doi.org/10.1103/PhysRevLett.99.176803
©2007 American Physical Society