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

doi:10.1103/PhysRevLett.88.047004

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

Department of Physics

Research output: Contribution to journal › Article

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 language	English
Number of pages	1
Journal	Physical Review Letters
Volume	88
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.88.047004
Publication status	Published - 2002 Jan 1

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1103/PhysRevLett.88.047004

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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.",

author = "Chen, {C. D.} and Watson Kuo and Chung, {D. S.} and Shyu, {J. H.} and Wu, {C. S.} and Watson Kuo and Shyu, {J. H.}",

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AU - Shyu, J. H.

AU - Wu, C. S.

AU - Kuo, Watson

AU - Shyu, J. H.

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N2 - 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.

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