High-contrast Aharonov-Bohm oscillations in the acoustoelectric transport regime
E. Strambini, E. Ligar\`o, F. Beltram, H. Beere, C. A. Nicoll, D. A., Ritchie, V. Piazza
TL;DR
This paper reports the observation of high-contrast Aharonov-Bohm oscillations in acoustoelectric current within mesoscopic GaAs rings, revealing a strong quantum interference effect at cryogenic temperatures.
Contribution
It presents the first experimental observation of Aharonov-Bohm oscillations in acoustoelectric transport with over 100% visibility and offers a theoretical model linking acoustoelectric and thermoelectric effects.
Findings
Aharonov-Bohm oscillations with >100% visibility in acoustoelectric current.
Close analogy between acoustoelectric and thermoelectric transport in ballistic devices.
Theoretical analysis supports experimental observations.
Abstract
Phase-coherent acoustoelectric transport is reported.Aharonov-Bohm oscillations in the acoustoelectric current with visibility exceeding 100% were observed in mesoscopic GaAs rings as a function of an external magnetic field at cryogenic temperatures. A theoretical analysis of the acoustoelectric transport in ballistic devices is proposed to model experimental observations. Our findings highlight a close analogy between acoustoelectric transport and thermoelectric properties in ballistic devices.
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Taxonomy
TopicsOptical and Acousto-Optic Technologies