Cooper-Pair Spin Current in a Strontium Ruthenate Heterostructure

Abstract

It has been recognized that the condensation of spin-triplet Cooper pairs requires not only the broken gauge symmetry but also the spin ordering as well. One consequence of this is the possibility of the Cooper-pair spin current analogous to the magnon spin current in magnetic insulators, the analogy also extending to the existence of the Gilbert damping of the collective spin-triplet dynamics. The recently fabricated heterostructure of the thin film of the itinerant ferromagnet SrRuO3 on the bulk Sr2RuO4, the best-known candidate material for the spin-triplet superconductor, offers a promising platform for generating such spin current. We will show how such heterostructure allows us to not only realize the long-range spin valve but also electrically drive the collective spin mode of the spin-triplet order parameter. Our proposal represents both a new realization of the spin superfluidity and a transport signature of the spin-triplet superconductivity.

arXiv comment5 pages, 3 figures

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Cited by in corpus (10)

• Spin-transport in superconductors
• Transport signature of the magnetic Berezinskii-Kosterlitz-Thouless transition
• Electronic and vibrational signatures of ruthenium vacancies in Sr${}_2$RuO${}_4$ thin films
• Anomalous Nonlocal Conductance as a Fingerprint of Chiral Majorana Edge States
• Thermal transport of helium-3 in a strongly confining channel
• Berezinskii-Kosterlitz-Thouless transition transport in spin-triplet superconductor
• Surface Cooper pair spin waves in triplet superconductors
• Spin transport and Spin Tunnelling Magneto-Resistance (STMR) of F$|$NCSC$|$F spin valve
• Dissipationless Spin-Charge Conversion in Excitonic Pseudospin Superfluid
• Magnetic exchange interaction in spin-valve with chiral spin-triplet superconductor