Evidence for Suppression of Superconductivity by Spin Imbalance in Co-Al-Co Single-Electron Transistors

C. D. Chen, Watson Kuo, D. S. Chung, J. H. Shyu, C. S. Wu, Watson Kuo, J. H. Shyu

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Spin imbalance can lead to suppression of superconductivity. We report the phenomena manifesting this effect under spin-polarized quasiparticle currents in ferromagnet-superconductor-ferromagnet single-electron transistors. The measured superconducting gap as a function of magnetic field reveals a dramatic decrease when the magnetizations of the two leads are misaligned. The effect of suppression increases with increasing source-drain voltage. A comparison with theoretical calculations is presented. This method may render it applicable to control superconductivity at low temperatures within low fields.

Original languageEnglish
Pages (from-to)4
Number of pages1
JournalPhysical Review Letters
Volume88
Issue number4
DOIs
Publication statusPublished - 2002

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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