Control of Superconductivity in a Hybrid Superconducting/Ferromagnetic Multilayer Using Nonequilibrium Tunneling Injection

Serhii Shafranjuk, I. P. Nevirkovets, O. A. Mukhanov, J. B. Ketterson

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

We report a theoretical and experimental study on the use of nonequilibrium tunneling injection to control the local Cooper pair amplitude ΦS in an SF sandwich involving superconducting (S) and ferromagnetic (F) layers coupled by the proximity effect. In an SISFIFS structure (where I is an insulator), this same SF sandwich serves as the acceptor electrode of an SISF Josephson junction whose critical current Ica depends on ΦS. We derive the self-consistency equation describing the critical temperature Tc of the SF sandwich under nonequilibrium conditions. In addition, we compute Ica by solving the Boltzmann equation for the electron distribution function f, which then allows a determination of the relative change of δIca/δIi(Vi) versus the bias voltage Vi and the injection current Ii(Vi). The computed gain δIca/δIi(Vi) strongly depends on δIca/δIi(Vi), and agrees well with the experimental data.

Original languageEnglish (US)
Article number024018
JournalPhysical Review Applied
Volume6
Issue number2
DOIs
StatePublished - Aug 26 2016

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Control of Superconductivity in a Hybrid Superconducting/Ferromagnetic Multilayer Using Nonequilibrium Tunneling Injection'. Together they form a unique fingerprint.

  • Cite this