Control of the spin geometric phase in semiconductor quantum rings

Since the formulation of the geometric phase by Berry, its relevance has been demonstrated in a large variety of physical systems. However, a geometric phase of the most fundamental spin-1/2 system, the electron spin, has not been observed directly and controlled independently from dynamical phases....

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Detalles Bibliográficos
Autores: Nagasawa, Fumiya, Frustaglia, Diego César, Saarikosk, Henri, Richter, Klaus, Nitta, Junsaku
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2013
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/107396
Acceso en línea:https://hdl.handle.net/11441/107396
https://doi.org/10.1038/ncomms3526
Access Level:acceso abierto
Palabra clave:Semiconductor
Quantum rings
Spin geometric phase
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spelling Control of the spin geometric phase in semiconductor quantum ringsNagasawa, FumiyaFrustaglia, Diego CésarSaarikosk, HenriRichter, KlausNitta, JunsakuSemiconductorQuantum ringsSpin geometric phaseSince the formulation of the geometric phase by Berry, its relevance has been demonstrated in a large variety of physical systems. However, a geometric phase of the most fundamental spin-1/2 system, the electron spin, has not been observed directly and controlled independently from dynamical phases. Here we report experimental evidence on the manipulation of an electron spin through a purely geometric effect in an InGaAs-based quantum ring with Rashba spin-orbit coupling. By applying an in-plane magnetic field, a phase shift of the Aharonov–Casher interference pattern towards the small spin-orbit-coupling regions is observed. A perturbation theory for a one-dimensional Rashba ring under small in-plane fields reveals that the phase shift originates exclusively from the modulation of a pure geometricphase component of the electron spin beyond the adiabatic limit, independently from dynamical phases. The phase shift is well reproduced by implementing two independent approaches, that is, perturbation theory and non-perturbative transport simulations.Springer NaturFísica Aplicada II2013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/107396https://doi.org/10.1038/ncomms3526reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésNature Communications, 4 (2526), 1-7.http://dx.doi.org/10.1038/ncomms3526info:eu-repo/semantics/openAccessoai:idus.us.es:11441/1073962026-06-17T12:51:07Z
dc.title.none.fl_str_mv Control of the spin geometric phase in semiconductor quantum rings
title Control of the spin geometric phase in semiconductor quantum rings
spellingShingle Control of the spin geometric phase in semiconductor quantum rings
Nagasawa, Fumiya
Semiconductor
Quantum rings
Spin geometric phase
title_short Control of the spin geometric phase in semiconductor quantum rings
title_full Control of the spin geometric phase in semiconductor quantum rings
title_fullStr Control of the spin geometric phase in semiconductor quantum rings
title_full_unstemmed Control of the spin geometric phase in semiconductor quantum rings
title_sort Control of the spin geometric phase in semiconductor quantum rings
dc.creator.none.fl_str_mv Nagasawa, Fumiya
Frustaglia, Diego César
Saarikosk, Henri
Richter, Klaus
Nitta, Junsaku
author Nagasawa, Fumiya
author_facet Nagasawa, Fumiya
Frustaglia, Diego César
Saarikosk, Henri
Richter, Klaus
Nitta, Junsaku
author_role author
author2 Frustaglia, Diego César
Saarikosk, Henri
Richter, Klaus
Nitta, Junsaku
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Física Aplicada II
dc.subject.none.fl_str_mv Semiconductor
Quantum rings
Spin geometric phase
topic Semiconductor
Quantum rings
Spin geometric phase
description Since the formulation of the geometric phase by Berry, its relevance has been demonstrated in a large variety of physical systems. However, a geometric phase of the most fundamental spin-1/2 system, the electron spin, has not been observed directly and controlled independently from dynamical phases. Here we report experimental evidence on the manipulation of an electron spin through a purely geometric effect in an InGaAs-based quantum ring with Rashba spin-orbit coupling. By applying an in-plane magnetic field, a phase shift of the Aharonov–Casher interference pattern towards the small spin-orbit-coupling regions is observed. A perturbation theory for a one-dimensional Rashba ring under small in-plane fields reveals that the phase shift originates exclusively from the modulation of a pure geometricphase component of the electron spin beyond the adiabatic limit, independently from dynamical phases. The phase shift is well reproduced by implementing two independent approaches, that is, perturbation theory and non-perturbative transport simulations.
publishDate 2013
dc.date.none.fl_str_mv 2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/107396
https://doi.org/10.1038/ncomms3526
url https://hdl.handle.net/11441/107396
https://doi.org/10.1038/ncomms3526
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Nature Communications, 4 (2526), 1-7.
http://dx.doi.org/10.1038/ncomms3526
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Springer Natur
publisher.none.fl_str_mv Springer Natur
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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