PL EN


Preferences help
enabled [disable] Abstract
Number of results
2012 | 121 | 5-6 | 1092-1094
Article title

Tunneling Charge Transport in Graphene-Based Superconductor Junctions

Content
Title variants
Languages of publication
EN
Abstracts
EN
We study the spin polarized electron and hole tunneling transport through a graphene-based ferromagnet(GF_1)-insulator(GI_1)-superconductor(G_{S})-insulator(GI_2)-ferromagnet(GF_2) junction. Proximity induced spin polarization and superconductivity in a graphene sheet are assumed to be created by superconducting and ferromagnetic electrodes placed on the top of the graphene. Using a four-dimensional version of the Dirac-Bogoliubov-de Gennes equation with appropriate boundary conditions we investigate the tunneling processes through the junctions. In particular, we present calculations of the amplitudes of normal and Andreev reflections as a function of the energy of the incident electron for a wide range of the model parameters, such as the strength and orientation of the exchange field, the barrier strength, and the distance between the two ferromagnetic layers. The tunneling transport processes in the graphene-based double junction GF/GI/G_{S}/GI/GF are compared with those in non-graphene-based junctions.
Keywords
EN
Contributors
  • Solid State Theory Division, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
author
  • Solid State Theory Division, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
author
  • Solid State Theory Division, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
References
  • 1. P.R. Wallace, Phys. Rev. 71, 622 (1947)
  • 2. S.Y. Zhou, G.H. Gweon, J, Graf, A.V. Fedorov, C.D. Spataru R.D. Diehl, Y. Kopelevich, D.-H. Lee, S.G. Louie, A. Lanzara, Nat. Phys. 2, 595 (2006)
  • 3. K.S Novoselov, A.K. Geim, S.V. Morozov, D. Jing, M.I. Katsnelson, I.V. Grigorieva, S.V. Dubonos, A.A. Firsov, Nature (London) 438, 197 (2005)
  • 4. B. Huard, J.A. Sulpizio, N. Stander, K. Todd, B. Yang, D. Goldhaber-Gordon, Phys. Rev. Lett. 102, 026807 (2009)
  • 5. C.W.J. Beenakker, Phys. Rev. Lett. 97, 067007 (2006)
  • 6. G.E. Blonder, M. Tinkham, T.M. Klapwijk, Phys. Rev. B 25, 4515 (1982)
  • 7. S. Takahashi, H. Imamura, S. Maekawa, Phys. Rev. Lett. 82, 3911 (1999)
  • 8. R.J. Wojciechowski, L. Kowalewski, Acta Phys. Pol. A 118, 249 (2010)
  • 9. C. Benjamin, J.K Pachos, Phys. Rev. B 78, 235403 (2008)
  • 10. M. Salehi, G. Rashedi, Physica C 470, 703 (2010)
  • 11. M. Božević, Z. Radović, Phys. Rev. B 66, 134524 (2002)
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv121n5-6p30kz
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.