An Aharonov-Casher (AC) spin interference is studied in a gate-fitted InGaAs ring array. The AC interference period is consistent with gate voltage dependence of Rashba spin-orbit interaction parameter in a single subband occupied region. However, the AC interference amplitude and oscillations are suppressed above a particular gate voltage where the second subband is occupied. This suppression is attributed to the decoherence induced by inter-subband scattering.
ASJC Scopus subject areas
- Physics and Astronomy(all)