Spin Dependent Electron Tunneling in a Ferromagnet Superconductor Ferromagnet Junction

• Authors: L. Kowalewski , R. Wojciechowski
• Languages of publication: EN

Abstracts

EN

The coherent spin polarized transport in ferromagnet/superconductor/ferromagnet double barrier junctions is analyzed. Using the Bogolubov-de Gennes equation with appropriate boundary conditions, we calculate probabilities of spin dependent transport processes in the ferromagnet/superconductor/ferromagnet junction. In particular, we discuss the nonlocal processes such as the crossed Andreev reflection and elastic co-tunneling. These processes contribute to tunneling a current when the distance between the two magnetic electrodes is comparable to the superconducting coherence length. The dependences of the tunneling transport processes on the strength of the exchange field in the ferromagnetic electrodes, and on the height of the tunnel barriers are presented.

Keywords

EN

74.45.+c; 74.50.+r; 73.23.Ad

Discipline

• 74.50.+r: Tunneling phenomena; Josephson effects(for SQUIDs, see 85.25.Dq; for Josephson devices, see 85.25.Cp; for Josephson junction arrays, see 74.81.Fa)
• 73.23.Ad: Ballistic transport
• 74.45.+c: Proximity effects; Andreev reflection; SN and SNS junctions

• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 115
• Issue: 1
• Pages: 257-259

Dates

published

2009-01

Contributors

author

L. Kowalewski

• Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

R. Wojciechowski

• Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

References

• 1. J.P. Morten, A. Brataas, W. Belzig, Phys. Rev. B 74, 214510 (2006)
• 2. J.M. Byers, M. Flatté, Phys. Rev. Lett. 74, 306 (1995)
• 3. S. Russo, M. Kroug, T.M. Klapwijk, A.F. Morpurgo, Phys. Rev. Lett. 95, 027002 (2005)
• 4. D. Beckmann, H. v. Löhneysen, AIP Conf. Proc. 850, 875 (2006)
• 5. J.M. Božević, Z. Radović, Phys. Rev. B 66, 134524 (2002)
• 6. Z.C. Dong, R. Shen, Z.M. Zheng, D.Y. Xing, Z.D. Wang, Phys. Rev. B 67, 134515 (2003)
• 7. T. Yamashita, H. Imamura, S. Takahashi, S. Maekawa, Phys. Rev. B 67, 094515 (2003)
• 8. T. Yamashita, S. Takahashi, S. Maekawa, Phys. Rev. B 68, 174504 (2003)
• 9. G.E. Blonder, M. Tinkham, T.M. Klapwijk, Phys. Rev. B 25, 4515 (1982)
• 10. C. Benjamin, Phys. Rev. B 74, 1805503 (2006)

Identifiers

DOI

10.12693/APhysPolA.115.257