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dc.contributor.authorVirtanen, Pauli
dc.contributor.authorHeikkilä, Tero
dc.date.accessioned2017-06-14T09:16:21Z
dc.date.available2017-06-14T09:16:21Z
dc.date.issued2017
dc.identifier.citationVirtanen, P., & Heikkilä, T. (2017). Spin Pumping and Torque Statistics in the Quantum Noise Limit. <i>Physical Review Letters</i>, <i>118</i>(23), Article 237701. <a href="https://doi.org/10.1103/PhysRevLett.118.237701" target="_blank">https://doi.org/10.1103/PhysRevLett.118.237701</a>
dc.identifier.otherCONVID_27056896
dc.identifier.otherTUTKAID_74089
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/54480
dc.description.abstractWe analyze the statistics of charge and energy currents and spin torque in a metallic nanomagnet coupled to a large magnetic metal via a tunnel contact. We derive a Keldysh action for the tunnel barrier, describing the stochastic currents in the presence of a magnetization precessing with the rate Ω. In contrast to some earlier approaches, our result is valid for an arbitrary ratio of ℏΩ/kBT. We illustrate the use of the action by deriving spintronic fluctuation relations, the quantum limit of pumped current noise, and consider the fluctuations in two specific cases: the situation with a stable precession of magnetization driven by spin transfer torque, and the torque-induced switching between the minima of a magnetic anisotropy. The quantum corrections are relevant when the precession rate exceeds the temperature T, i.e., for ℏΩ≳kBT.en
dc.languageeng
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review Letters
dc.subject.otherspin pumping
dc.subject.othertorque statistics
dc.subject.otherquantum noise limit
dc.titleSpin Pumping and Torque Statistics in the Quantum Noise Limit
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201706122806
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.contributor.oppiaineFysiikkafi
dc.contributor.oppiaineNanoscience Centerfi
dc.contributor.oppiainePhysicsen
dc.contributor.oppiaineNanoscience Centeren
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2017-06-12T12:15:08Z
dc.type.coarhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.description.reviewstatuspeerReviewed
dc.relation.issn0031-9007
dc.relation.numberinseries23
dc.relation.volume118
dc.type.versionpublishedVersion
dc.rights.copyright© 2017 American Physical Society. Published in this repository with the kind permission of the publisher.
dc.rights.accesslevelopenAccessfi
dc.relation.grantnumber284594 AALTO YO
dc.subject.ysonanotekniikka
dc.subject.ysokvanttimekaniikka
dc.subject.ysovirtauslaskenta
dc.subject.ysomagnetismi
jyx.subject.urihttp://www.yso.fi/onto/yso/p11463
jyx.subject.urihttp://www.yso.fi/onto/yso/p5563
jyx.subject.urihttp://www.yso.fi/onto/yso/p21150
jyx.subject.urihttp://www.yso.fi/onto/yso/p7808
dc.relation.doi10.1103/PhysRevLett.118.237701
dc.relation.funderSuomen Akatemiafi
dc.relation.funderAcademy of Finlanden
jyx.fundingprogramHuippuyksikkörahoitus, SAfi
jyx.fundingprogramCentre of Excellence, AoFen
jyx.fundinginformationThis work was supported by the MIUR-FIRB2013-Project Coca (Grant No. RBFR1379UX), the Academy of Finland Centre of Excellence program (Project No. 284594) and the European Research Council (Grant No. 240362-Heattronics).
dc.type.okmA1


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