Aharonov-Bohm oscillations in the presence of strong spin-orbit interactions

Details Aharonov-Bohm oscillations in the presence of strong spin-orbit interactions Aharonov-Bohm oscillations in the presence of strong spin-orbit interactions

2007-04-10

arxiv.org/abs/0704.1264v2

Phys. Rev. Lett. 99, 176803 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures, published version

Scientific paper

10.1103/PhysRevLett.99.176803

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.

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