Possibility of Cooper-pair formation controlled by multi-Terminal spin injection

K. Ohnishi, M. Sakamoto, M. Ishitaki, T. Kimura

Research output: Contribution to journalConference articlepeer-review

Abstract

A multi-Terminal lateral spin valve consisting of three ferromagnetic nanopillars on a Cu/Nb bilayer has been fabricated. We investigated the influence of the spin injection on the superconducting properties at the Cu/Nb interface. The non-local spin valve signal exhibits a clear spin insulation signature due to the superconducting gap of the Nb. The magnitude of the spin signal is found to show the probe configuration dependence. From the careful analysis of the bias current dependence, we found the suppression of the superconductivity due to the exchange interaction between the Cooper pair and accumulated spin plays an important role in the multi-Terminal spin injections. We also discuss about the possibility of the Cooper-pair formation due to the spin injection from the two injectors with the anti-parallel alignment.

Original languageEnglish
Article number012028
JournalJournal of Physics: Conference Series
Volume969
Issue number1
DOIs
Publication statusPublished - Apr 19 2018
Event28th International Conference on Low Temperature Physics, LT 2018 - Gothenburg, Sweden
Duration: Aug 9 2017Aug 16 2017

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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