Triplet Cooper pairs induced in diffusive s-wave superconductors interfaced with strongly spin-polarized magnetic insulators or half-metallic ferromagnets. / Ouassou, Jabir Ali; Pal, Avradeep; Blamire, Mark G.; Eschrig, Matthias; Linder, Jacob.

In: Scientific Reports, Vol. 7, 1932, 16.05.2017, p. 1-16.

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Triplet Cooper pairs induced in diffusive s-wave superconductors interfaced with strongly spin-polarized magnetic insulators or half-metallic ferromagnets. / Ouassou, Jabir Ali; Pal, Avradeep; Blamire, Mark G.; Eschrig, Matthias; Linder, Jacob.

In: Scientific Reports, Vol. 7, 1932, 16.05.2017, p. 1-16.

Research output: Contribution to journalArticlepeer-review

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Ouassou, Jabir Ali ; Pal, Avradeep ; Blamire, Mark G. ; Eschrig, Matthias ; Linder, Jacob. / Triplet Cooper pairs induced in diffusive s-wave superconductors interfaced with strongly spin-polarized magnetic insulators or half-metallic ferromagnets. In: Scientific Reports. 2017 ; Vol. 7. pp. 1-16.

BibTeX

@article{063ec42c6ed441b48a67ae19f49de2d7,
title = "Triplet Cooper pairs induced in diffusive s-wave superconductors interfaced with strongly spin-polarized magnetic insulators or half-metallic ferromagnets",
abstract = "Interfacing superconductors with strongly spin-polarized magnetic materials opens up the possibility to discover new and enhanced types of low-temperature spintronics devices where spin-triplet Cooper pairs play a key role. Motivated by the recent derivation of spin-polarized quasiclassical boundary conditions capable of describing such a scenario in the diffusive limit, we here consider the emergent physics in diffusive hybrid structures comprised of a conventional s-wave superconductor (e.g. Nb, Al) and either strongly spin-polarized ferromagnetic insulators (e.g. EuO, GdN) or half-metallic ferromagnets (e.g. CrO2, LCMO). Unlike the majority of previous works, we here focus on how the superconductor itself is influenced by the proximity effect, and how the generated triplet Cooper pairs manifest themselves in the self-consistently computed density of states (DOS) and the superconducting criticaltemperature Tc of the device. We provide a comprehensive treatment of how the superconductor and its properties are affected by the triplet pairs. We show that our theory can reproduce the recent observation of an unusually large zero-energy peak in a superconductor interfaced with a half-metal, which even exceeds the normal-state DOS. Our results also shed light on the recent experimental observation of a large Tc change in superconductor/half-metal structures, and suggests that there may be other physics at work besides a long-ranged triplet proximity effect.",
author = "Ouassou, {Jabir Ali} and Avradeep Pal and Blamire, {Mark G.} and Matthias Eschrig and Jacob Linder",
year = "2017",
month = may,
day = "16",
doi = "10.1038/s41598-017-01330-1",
language = "English",
volume = "7",
pages = "1--16",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",

}

RIS

TY - JOUR

T1 - Triplet Cooper pairs induced in diffusive s-wave superconductors interfaced with strongly spin-polarized magnetic insulators or half-metallic ferromagnets

AU - Ouassou, Jabir Ali

AU - Pal, Avradeep

AU - Blamire, Mark G.

AU - Eschrig, Matthias

AU - Linder, Jacob

PY - 2017/5/16

Y1 - 2017/5/16

N2 - Interfacing superconductors with strongly spin-polarized magnetic materials opens up the possibility to discover new and enhanced types of low-temperature spintronics devices where spin-triplet Cooper pairs play a key role. Motivated by the recent derivation of spin-polarized quasiclassical boundary conditions capable of describing such a scenario in the diffusive limit, we here consider the emergent physics in diffusive hybrid structures comprised of a conventional s-wave superconductor (e.g. Nb, Al) and either strongly spin-polarized ferromagnetic insulators (e.g. EuO, GdN) or half-metallic ferromagnets (e.g. CrO2, LCMO). Unlike the majority of previous works, we here focus on how the superconductor itself is influenced by the proximity effect, and how the generated triplet Cooper pairs manifest themselves in the self-consistently computed density of states (DOS) and the superconducting criticaltemperature Tc of the device. We provide a comprehensive treatment of how the superconductor and its properties are affected by the triplet pairs. We show that our theory can reproduce the recent observation of an unusually large zero-energy peak in a superconductor interfaced with a half-metal, which even exceeds the normal-state DOS. Our results also shed light on the recent experimental observation of a large Tc change in superconductor/half-metal structures, and suggests that there may be other physics at work besides a long-ranged triplet proximity effect.

AB - Interfacing superconductors with strongly spin-polarized magnetic materials opens up the possibility to discover new and enhanced types of low-temperature spintronics devices where spin-triplet Cooper pairs play a key role. Motivated by the recent derivation of spin-polarized quasiclassical boundary conditions capable of describing such a scenario in the diffusive limit, we here consider the emergent physics in diffusive hybrid structures comprised of a conventional s-wave superconductor (e.g. Nb, Al) and either strongly spin-polarized ferromagnetic insulators (e.g. EuO, GdN) or half-metallic ferromagnets (e.g. CrO2, LCMO). Unlike the majority of previous works, we here focus on how the superconductor itself is influenced by the proximity effect, and how the generated triplet Cooper pairs manifest themselves in the self-consistently computed density of states (DOS) and the superconducting criticaltemperature Tc of the device. We provide a comprehensive treatment of how the superconductor and its properties are affected by the triplet pairs. We show that our theory can reproduce the recent observation of an unusually large zero-energy peak in a superconductor interfaced with a half-metal, which even exceeds the normal-state DOS. Our results also shed light on the recent experimental observation of a large Tc change in superconductor/half-metal structures, and suggests that there may be other physics at work besides a long-ranged triplet proximity effect.

UR - http://lanl.arxiv.org/abs/1610.05300

U2 - 10.1038/s41598-017-01330-1

DO - 10.1038/s41598-017-01330-1

M3 - Article

VL - 7

SP - 1

EP - 16

JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

M1 - 1932

ER -