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dc.contributor.authorLi, Lailai
dc.contributor.authorZhao, Yuelei
dc.contributor.authorZhang, Xixiang
dc.contributor.authorSun, Young
dc.date.accessioned2017-12-28T07:32:15Z
dc.date.available2017-12-28T07:32:15Z
dc.date.issued2017-10-04
dc.identifier.urihttp://hdl.handle.net/10754/626538
dc.description.abstractCooper pairs in superconductors are normally spin singlet. Nevertheless, recent studies suggest that spin-triplet Cooper pairs can be created at carefully engineered superconductor-ferromagnet interfaces. If Cooper pairs are spin-polarized they would transport not only charge but also a net spin component, but without dissipation, and therefore minimize the heating effects associated with spintronic devices. Although it is now established that triplet supercurrents exist, their most interesting property - spin - is only inferred indirectly from transport measurements. In conventional spintronics, it is well known that spin currents generate spin-transfer torques that alter magnetization dynamics and switch magnetic moments. The observation of similar effects due to spin-triplet supercurrents would not only confirm the net spin of triplet pairs but also pave the way for applications of superconducting spintronics. Here, we present a possible evidence for spin-transfer torques induced by triplet supercurrents in superconductor/ferromagnet/superconductor (S/F/S) Josephson junctions. Below the superconducting transition temperature T_c, the ferromagnetic resonance (FMR) field at X-band (~ 9.0 GHz) shifts rapidly to a lower field with decreasing temperature due to the spin-transfer torques induced by triplet supercurrents. In contrast, this phenomenon is absent in ferromagnet/superconductor (F/S) bilayers and superconductor/insulator/ferromagnet/superconductor (S/I/F/S) multilayers where no supercurrents pass through the ferromagnetic layer. These experimental observations are discussed with theoretical predictions for ferromagnetic Josephson junctions with precessing magnetization.
dc.publisherarXiv
dc.relation.urlhttp://arxiv.org/abs/1710.01534v1
dc.relation.urlhttp://arxiv.org/pdf/1710.01534v1
dc.rightsArchived with thanks to arXiv
dc.titlePossible evidence for spin-transfer torque induced by spin-triplet supercurrent
dc.typePreprint
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.eprint.versionPre-print
dc.contributor.institutionSchool of Physical Science, University of Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
dc.contributor.institutionBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
dc.identifier.arxivid1710.01534
kaust.personZhao, Yuelei
kaust.personZhang, Xixiang
dc.versionv1
refterms.dateFOA2018-06-13T11:11:20Z


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