Detection of ultrafast oscillations in superconducting point contacts by means of supercurrent measurements

We present a microscopic calculation of the nondissipative current through a superconducting quantum point contact coupled to a mechanical oscillator. Using the nonequilibrium Keldysh Green function approach, we determine the current-phase relation. The latter shows that at certain phases, the curre...

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Detalles Bibliográficos
Autores: Avriller, R., Bergeret, F. Sebastian, Pistolesi, F.
Tipo de recurso: artículo
Fecha de publicación:2011
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:dnet:digitalcsic_::6a64059a4cddf0feba6bdf80f6eb2c6a
Acceso en línea:http://hdl.handle.net/10261/50533
Access Level:acceso abierto
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spelling Detection of ultrafast oscillations in superconducting point contacts by means of supercurrent measurementsAvriller, R.Bergeret, F. SebastianPistolesi, F.We present a microscopic calculation of the nondissipative current through a superconducting quantum point contact coupled to a mechanical oscillator. Using the nonequilibrium Keldysh Green function approach, we determine the current-phase relation. The latter shows that at certain phases, the current is sharply suppressed. These dips in the current-phase relation provide information about the oscillating frequency and coupling strength of the mechanical oscillator. We also present an effective two-level model from which we obtain analytical expressions describing the position and width of the dips. Our findings are of relevance for nanomechanical resonators based on superconducting materials. © 2011 American Physical Society.Peer ReviewedAmerican Physical Society2012201220112012info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/50533reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglésinfo:eu-repo/semantics/openAccessoai:dnet:digitalcsic_::6a64059a4cddf0feba6bdf80f6eb2c6a2026-05-22T06:33:51Z
dc.title.none.fl_str_mv Detection of ultrafast oscillations in superconducting point contacts by means of supercurrent measurements
title Detection of ultrafast oscillations in superconducting point contacts by means of supercurrent measurements
spellingShingle Detection of ultrafast oscillations in superconducting point contacts by means of supercurrent measurements
Avriller, R.
title_short Detection of ultrafast oscillations in superconducting point contacts by means of supercurrent measurements
title_full Detection of ultrafast oscillations in superconducting point contacts by means of supercurrent measurements
title_fullStr Detection of ultrafast oscillations in superconducting point contacts by means of supercurrent measurements
title_full_unstemmed Detection of ultrafast oscillations in superconducting point contacts by means of supercurrent measurements
title_sort Detection of ultrafast oscillations in superconducting point contacts by means of supercurrent measurements
dc.creator.none.fl_str_mv Avriller, R.
Bergeret, F. Sebastian
Pistolesi, F.
author Avriller, R.
author_facet Avriller, R.
Bergeret, F. Sebastian
Pistolesi, F.
author_role author
author2 Bergeret, F. Sebastian
Pistolesi, F.
author2_role author
author
description We present a microscopic calculation of the nondissipative current through a superconducting quantum point contact coupled to a mechanical oscillator. Using the nonequilibrium Keldysh Green function approach, we determine the current-phase relation. The latter shows that at certain phases, the current is sharply suppressed. These dips in the current-phase relation provide information about the oscillating frequency and coupling strength of the mechanical oscillator. We also present an effective two-level model from which we obtain analytical expressions describing the position and width of the dips. Our findings are of relevance for nanomechanical resonators based on superconducting materials. © 2011 American Physical Society.
publishDate 2011
dc.date.none.fl_str_mv 2011
2012
2012
2012
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/50533
url http://hdl.handle.net/10261/50533
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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