Aharonov-Bohm oscillations in the presence of strong spin-orbit interactions.
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.
Grbić
Boris
B
Solid State Physics Laboratory, ETH Zurich, 8093 Zurich, Switzerland.
Leturcq
Renaud
R
Ihn
Thomas
T
Ensslin
Klaus
K
Reuter
Dirk
D
Wieck
Andreas D
AD