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Proceedings Paper

Sign change of linear Dresselhaus spin-orbit interaction observed in Aharonov-Casher spin interference (Conference Presentation)

Paper Abstract

The Aharonov-Casher (AC) effect where spin phase is modified by an electric field is a fundamental concept of quantum mechanics. The AC spin interferometer is an invaluable to probe spin phases information. We demonstrate a gate-controlled anisotropy in AC spin interferometry using InGaAs mesoscopic rings. The coexistence of Rashba and Dresselhaus spin-orbit interactions (SOIs) manifests as an AC resistance amplitude modulated by the direction of in-plane magnetic field as a probe. We establish ways to manipulate spin dynamic and geometric phases freely by introducing electric and magnetic tuning. Our experimental results are well explained by perturbation theory and numerical analysis performed at constant Dresselhaus spin-orbit interaction (SOI) strength except for one additional anisotropic reversal by tuning Rashba SOI. The observed additional AC resistance anisotropy reversal is explained by sign change in linear Dresselhaus SOI [1]. [1] F. Nagasawa, et al., Phys. Rev. B 98, 245301 (2018)

Paper Details

Date Published: 10 September 2019
Proc. SPIE 11090, Spintronics XII, 110900M (10 September 2019); doi: 10.1117/12.2528568
Show Author Affiliations
Junsaku Nitta, Tohoku Univ. (Japan)
Fumiya Nagasawa, Tohoku Univ. (Japan)
A. A. Reynoso, Ctr. Atómico Bariloche (Argentina)
Comisión Nacional de Energía Atómica (Argentina)
J. P. Baltanas, Univ. de Sevilla (Spain)
Diego Frustaglia, Univ. de Sevilla (Spain)
Henri Saarikoski, RIKEN Ctr. for Emergent Matter Science (Japan)

Published in SPIE Proceedings Vol. 11090:
Spintronics XII
Henri-Jean M. Drouhin; Jean-Eric Wegrowe; Manijeh Razeghi, Editor(s)

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