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Enhanced spin pumping into superconductors provides evidence for superconducting pure spin currents. / Jeon, Kun-Rok; Ciccarelli, Chiara; Ferguson, Andrew J.; Kurebayashi, Hidekazu; Cohen, Lesley F. ; Montiel, Xavier; Eschrig, Matthias; Robinson, Jason W. A. ; Blamire, Mark G. .

In: Nature Materials, Vol. 17, 06.2018, p. 499–503 .

Research output: Contribution to journal › Article › peer-review

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Enhanced spin pumping into superconductors provides evidence for superconducting pure spin currents. / Jeon, Kun-Rok; Ciccarelli, Chiara; Ferguson, Andrew J.; Kurebayashi, Hidekazu; Cohen, Lesley F. ; Montiel, Xavier ; Eschrig, Matthias; Robinson, Jason W. A. ; Blamire, Mark G. .

In: Nature Materials, Vol. 17, 06.2018, p. 499–503 .

Research output: Contribution to journal › Article › peer-review

Author

Jeon, Kun-Rok ; Ciccarelli, Chiara ; Ferguson, Andrew J. ; Kurebayashi, Hidekazu ; Cohen, Lesley F. ; Montiel, Xavier ; Eschrig, Matthias ; Robinson, Jason W. A. ; Blamire, Mark G. . / Enhanced spin pumping into superconductors provides evidence for superconducting pure spin currents. In: Nature Materials. 2018 ; Vol. 17. pp. 499–503 .

BibTeX

@article{4988bc68459f48e085e4eca49b25491a,

title = "Enhanced spin pumping into superconductors provides evidence for superconducting pure spin currents",

abstract = "Unlike conventional spin-singlet Cooper pairs, spin-triplet pairs can carry spin. Triplet supercurrents were discovered in Josephson junctions with metallic ferromagnet (FM) spacers, where spin transport can only occur within the FM and in conjunction with a charge current. Ferromagnetic resonance (FMR) injects a pure spin current from a precessing FM into adjacent non-magnetic materials. For spin-singlet pairing, FMR spin pumping efficiency decreases below the critical temperature (Tc) of a coupled superconductor (SC). Here we present FMR experiments in which spin sink layers with strong spin-orbit coupling are added to the SC. Our results show that the induced spin currents, rather than being suppressed, are substantially larger in the superconducting state compared with the normal state; although further work is required to establish the details of the spin transport process we show that this cannot be mediated by quasiparticles and is most likely a triplet pure spin supercurrent. ",

author = "Kun-Rok Jeon and Chiara Ciccarelli and Ferguson, {Andrew J.} and Hidekazu Kurebayashi and Cohen, {Lesley F.} and Xavier Montiel and Matthias Eschrig and Robinson, {Jason W. A.} and Blamire, {Mark G.}",

year = "2018",

month = jun,

doi = "10.1038/s41563-018-0058-9",

language = "English",

volume = "17",

pages = "499–503 ",

journal = "Nature Materials",

issn = "1476-1122",

publisher = "Nature Publishing Group",

}

RIS

TY - JOUR

T1 - Enhanced spin pumping into superconductors provides evidence for superconducting pure spin currents

AU - Jeon, Kun-Rok

AU - Ciccarelli, Chiara

AU - Ferguson, Andrew J.

AU - Kurebayashi, Hidekazu

AU - Cohen, Lesley F.

AU - Montiel, Xavier

AU - Eschrig, Matthias

AU - Robinson, Jason W. A.

AU - Blamire, Mark G.

PY - 2018/6

Y1 - 2018/6

N2 - Unlike conventional spin-singlet Cooper pairs, spin-triplet pairs can carry spin. Triplet supercurrents were discovered in Josephson junctions with metallic ferromagnet (FM) spacers, where spin transport can only occur within the FM and in conjunction with a charge current. Ferromagnetic resonance (FMR) injects a pure spin current from a precessing FM into adjacent non-magnetic materials. For spin-singlet pairing, FMR spin pumping efficiency decreases below the critical temperature (Tc) of a coupled superconductor (SC). Here we present FMR experiments in which spin sink layers with strong spin-orbit coupling are added to the SC. Our results show that the induced spin currents, rather than being suppressed, are substantially larger in the superconducting state compared with the normal state; although further work is required to establish the details of the spin transport process we show that this cannot be mediated by quasiparticles and is most likely a triplet pure spin supercurrent.

AB - Unlike conventional spin-singlet Cooper pairs, spin-triplet pairs can carry spin. Triplet supercurrents were discovered in Josephson junctions with metallic ferromagnet (FM) spacers, where spin transport can only occur within the FM and in conjunction with a charge current. Ferromagnetic resonance (FMR) injects a pure spin current from a precessing FM into adjacent non-magnetic materials. For spin-singlet pairing, FMR spin pumping efficiency decreases below the critical temperature (Tc) of a coupled superconductor (SC). Here we present FMR experiments in which spin sink layers with strong spin-orbit coupling are added to the SC. Our results show that the induced spin currents, rather than being suppressed, are substantially larger in the superconducting state compared with the normal state; although further work is required to establish the details of the spin transport process we show that this cannot be mediated by quasiparticles and is most likely a triplet pure spin supercurrent.

U2 - 10.1038/s41563-018-0058-9

DO - 10.1038/s41563-018-0058-9

M3 - Article

VL - 17

SP - 499

EP - 503

JO - Nature Materials

JF - Nature Materials

SN - 1476-1122

ER -