Quasiparticle spin resonance and coherence in superconducting aluminium
Identifieur interne : 000069 ( Main/Exploration ); précédent : 000068; suivant : 000070Quasiparticle spin resonance and coherence in superconducting aluminium
Auteurs : C. H. L. Quay [France] ; M. Weideneder [France] ; Y. Chiffaudel [France] ; C. Strunk [France, Allemagne] ; M. Aprili [France]Source :
- Nature Communications [ 2041-1723 ] ; 2015.
Abstract
Conventional superconductors were long thought to be spin inert; however, there is now increasing interest in both (the manipulation of) the internal spin structure of the ground-state condensate, as well as recently observed long-lived, spin-polarized excitations (quasiparticles). We demonstrate spin resonance in the quasiparticle population of a mesoscopic superconductor (aluminium) using novel on-chip microwave detection techniques. The spin decoherence time obtained (∼100 ps), and its dependence on the sample thickness are consistent with Elliott–Yafet spin–orbit scattering as the main decoherence mechanism. The striking divergence between the spin coherence time and the previously measured spin imbalance relaxation time (∼10 ns) suggests that the latter is limited instead by inelastic processes. This work stakes out new ground for the nascent field of spin-based electronics with superconductors or superconducting spintronics.
Url:
DOI: 10.1038/ncomms9660
PubMed: 26497744
PubMed Central: 4639902
Affiliations:
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H. L." last="Quay">C. H. L. Quay</name><affiliation wicri:level="1"><nlm:aff id="a1"><institution>Laboratoire de Physique des Solides (CNRS UMR 8502), Bâtiment 510, Université Paris-Sud</institution> 91405 Orsay,<country>France</country></nlm:aff><country xml:lang="fr">France</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author><author><name sortKey="Weideneder, M" sort="Weideneder, M" uniqKey="Weideneder M" first="M." last="Weideneder">M. Weideneder</name><affiliation wicri:level="1"><nlm:aff id="a1"><institution>Laboratoire de Physique des Solides (CNRS UMR 8502), Bâtiment 510, Université Paris-Sud</institution> 91405 Orsay,<country>France</country></nlm:aff><country xml:lang="fr">France</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author><author><name sortKey="Chiffaudel, Y" sort="Chiffaudel, Y" uniqKey="Chiffaudel Y" first="Y." last="Chiffaudel">Y. Chiffaudel</name><affiliation wicri:level="1"><nlm:aff id="a1"><institution>Laboratoire de Physique des Solides (CNRS UMR 8502), Bâtiment 510, Université Paris-Sud</institution> 91405 Orsay,<country>France</country></nlm:aff><country xml:lang="fr">France</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author><author><name sortKey="Strunk, C" sort="Strunk, C" uniqKey="Strunk C" first="C." last="Strunk">C. Strunk</name><affiliation wicri:level="1"><nlm:aff id="a1"><institution>Laboratoire de Physique des Solides (CNRS UMR 8502), Bâtiment 510, Université Paris-Sud</institution> 91405 Orsay,<country>France</country></nlm:aff><country xml:lang="fr">France</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation><affiliation wicri:level="1"><nlm:aff id="a2"><institution>Institute for Experimental and Applied Physics, University of Regensburg</institution> 93040 Regensburg,<country>Germany</country></nlm:aff><country xml:lang="fr">Allemagne</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author><author><name sortKey="Aprili, M" sort="Aprili, M" uniqKey="Aprili M" first="M." last="Aprili">M. Aprili</name><affiliation wicri:level="1"><nlm:aff id="a1"><institution>Laboratoire de Physique des Solides (CNRS UMR 8502), Bâtiment 510, Université Paris-Sud</institution> 91405 Orsay,<country>France</country></nlm:aff><country xml:lang="fr">France</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author></analytic><series><title level="j">Nature Communications</title><idno type="eISSN">2041-1723</idno><imprint><date when="2015">2015</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>Conventional superconductors were long thought to be spin inert; however, there is now increasing interest in both (the manipulation of) the internal spin structure of the ground-state condensate, as well as recently observed long-lived, spin-polarized excitations (quasiparticles). We demonstrate spin resonance in the quasiparticle population of a mesoscopic superconductor (aluminium) using novel on-chip microwave detection techniques. The spin decoherence time obtained (∼100 ps), and its dependence on the sample thickness are consistent with Elliott–Yafet spin–orbit scattering as the main decoherence mechanism. The striking divergence between the spin coherence time and the previously measured spin imbalance relaxation time (∼10 ns) suggests that the latter is limited instead by inelastic processes. This work stakes out new ground for the nascent field of spin-based electronics with superconductors or superconducting spintronics.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Abragam, A" uniqKey="Abragam A">A. Abragam</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Kittel, C" uniqKey="Kittel C">C. 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Chiffaudel</name><name sortKey="Strunk, C" sort="Strunk, C" uniqKey="Strunk C" first="C." last="Strunk">C. Strunk</name><name sortKey="Weideneder, M" sort="Weideneder, M" uniqKey="Weideneder M" first="M." last="Weideneder">M. Weideneder</name></country><country name="Allemagne"><noRegion><name sortKey="Strunk, C" sort="Strunk, C" uniqKey="Strunk C" first="C." last="Strunk">C. Strunk</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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