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Tunable creation of pure spin supercurrents via Rashba spin-orbit coupling with Pt/Co/Pt spin sinks
| Content Provider | Semantic Scholar |
|---|---|
| Author | Jeon, Kun-Rok Montiel, Xavier Ciccarelli, Chiara Kurebayashi, Hidekazu Cohen, Lesley F. Komori, S. Blamire, Mark G. Robinson, J. W. A. |
| Copyright Year | 2019 |
| Abstract | Superconducting spin currents are key to the development of superconducting spintronics and involve the transfer of spin angular momentum via proximity-induced equal-spin triplet states in a singlet superconductor (SC). Recently developed theory and experimental results show that spin-orbit coupling (SOC) in conjunction with a magnetic exchange field hex generates spin-polarized triplet pairs. Here we demonstrate that when a perpendicularly magnetized Pt/Co/Pt spin sink is proximity-coupled to Nb (a singlet SC), spin-pumping efficiency in the superconducting state is tunable by controlling the tilt angle {\theta}Co of the Co layer magnetization, thus increasing the degree of orthogonality between the SOC and hex at the Nb/Pt/(Co/Pt) interface. We also disentangle the contribution of interfacial SOC to the {\theta}Co-dependent superconducting spin-pumping efficiency from other contributions by inserting a thin Cu spacer with weak SOC at the Nb/Pt/(Co/Pt) interface and find a sinusoidal maximum at {\theta}Co = 45°, reflecting the characteristic features of Rashba SOC-induced triplet pairing. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://arxiv-export-lb.library.cornell.edu/pdf/1908.00873 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
