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2010 | 118 | 2 | 238-243
Article title

Electron Transport and Quantum-Dot Energy Levels in Z-Shaped Graphene Nanoconstriction with Zigzag Edges

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EN
Abstracts
EN
Motivated by recent advances in fabricating graphene nanostructures, we find that an electron can be trapped in Z-shaped graphene nanoconstriction with zigzag edges. The central section of the constriction operates as a single-level quantum dot, as the current flow towards the adjunct sections (rotated by 60°) is strongly suppressed due to mismatched valley polarization, although each section in isolation shows maximal quantum value of the conductance G_0 = 2e^2/h. We further show that the trapping mechanism is insensitive to the details of constriction geometry, except from the case when widths of the two neighboring sections are equal. The relation with earlier studies of electron transport through symmetric and asymmetric kinks with zigzag edges is also established.
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  • Instytut Fizyki im. Mariana Smoluchowskiego, Uniwersytet Jagielloński, Reymonta 4, PL-30-059 Kraków, Poland
  • Institut für Theoretische Physik, Universität Regensbur, D-93040 Regensburg, Germany
References
  • 1. K.S. Novoselov, A.K. Geim, S.V. Morozov, D. Jiang, Y. Zhang, S.V. Dubonos, I.V. Grigorieva, A.A. Firsov, Science 306, 666 (2004)
  • 2. K.S. Novoselov, A.K. Geim, S.V. Morozov, D. Jiang, Y. Zhang, S.V. Dubonos, I.V. Grigorieva, A.A. Firsov, Nature 438, 197 (2005); Y. Zhang, Y.-W. Tan, H.L. Stormer, P. Kim, Nature 438, 201 (2005)
  • 3. A.H. Castro Neto, F. Guinea, N.M.R. Peres, K.S. Novoselov, A.K. Geim, Rev. Mod. Phys. 81, 109 (2009)
  • 4. A.K. Geim, K.S. Novoselov, Nature Mater. 6, 183 (2007); A.K. Geim, Science 324, 1530 (2009)
  • 5. C.W.J. Beenakker, Rev. Mod. Phys. 80, 1337 (2008)
  • 6. Z. Chen, Y.-M. Lin, M. Rooks, P. Avouris, Physica E 40, 228 (2007)
  • 7. M.Y. Han, B. Özyilmaz, Y. Zhang, P. Kim, Phys. Rev. Lett. 98, 206805 (2007)
  • 8. X. Li, X. Wang, L. Zhang, S. Lee, H. Dai, Science 319, 1229 (2008)
  • 9. X. Wang, Y. Ouyang, X. Li, H. Wang, J. Guo, H. Dai, Phys. Rev. Lett. 100, 206803 (2008)
  • 10. C. Stampfer, J. Guettinger, S. Hellmueller, F. Molitor, K. Ensslin, T. Ihn, Phys. Rev. Lett. 102, 056403 (2009)
  • 11. P.G. Silvestrov, K.B. Efetov, Phys. Rev. Lett. 98, 016802 (2007)
  • 12. L.A. Ponomarenko, F. Schedin, M.I. Katsnelson, R. Yang, E.W. Hill, K.S. Novoselov, A.K. Geim, Science 320, 356 (2008)
  • 13. C. Stampfer, J. Guettinger, F. Molitor, D. Graf, T. Ihn, K. Ensslin, Appl. Phys. Lett. 92, 012102 (2008); J. Guettinger, C. Stampfer, S. Hellmueller, F. Molitor, T. Ihn, K. Ensslin, ibid. 93, 212102 (2008)
  • 14. M.V. Berry, R.J. Mondragon, Proc. R. Soc. A 412, 53 (1987)
  • 15. J. Wurm, A. Rycerz, I. Adagideli, M. Wimmer, K. Richter, H.U. Baranger, Phys. Rev. Lett. 102, 056806 (2009); F. Libisch, C. Stampfer, J. Burgdörfer, Phys. Rev. B 79, 115423 (2009)
  • 16. M. Fujita, K. Wakabayashi, K. Nakada, K. Kusakabe, J. Phys. Soc. Japan 65, 1920 (1996)
  • 17. K. Nakada, M. Fujita, G. Dresselhaus, M.S. Dresselhaus, Phys. Rev. B 54, 17954 (1996)
  • 18. K. Wakabayashi, Phys. Rev. B 64, 125428 (2001)
  • 19. F. Muñoz-Rojas, D. Jacob, J. Fernández-Rossier, J.J. Palacios, Phys. Rev. B 74, 195417 (2006)
  • 20. B. Trauzettel, D.V. Bulaev, D. Loss, G. Burkard, Nature Phys. 3, 192 (2007); J. Milton Pereira, Jr., P. Vasilopoulus, F. Peeters, Nano Lett. 7, 946 (2007)
  • 21. A. Rycerz, J. Tworzydło, C.W.J. Beenakker, Nature Phys. 3, 172 (2007); M. Wimmer, I. Adagideli, S. Berber, D. Tomanek, K. Richter, Phys. Rev. Lett. 100, 177207 (2008)
  • 22. S.A. Wolf, Science 294, 1488 (2001); V. Cerletti, W.A. Coish, O. Gywat, D. Loss, Nanotechnology 16, R27 (2005)
  • 23. J. Tworzydło, B. Trauzettel, M. Titov, A. Rycerz, C.W.J. Beenakker, Phys. Rev. Lett. 96, 246802 (2006)
  • 24. M.H. Gass, U. Bangert, A.L. Bleloch, P. Wang, R.R. Nair, A.K. Geim, Nature Nanotech. 3, 676 (2008)
  • 25. B. Huang, M. Liu, N. Su, J. Wu, W. Duan, B.-L. Gu, F. Liu, Phys. Rev. Lett. 102, 166404 (2009); S. Jun, Phys. Rev. B 78, 073405 (2008)
  • 26. P. Recher, B. Trauzettel, A. Rycerz, Ya.M. Blanter, C.W.J. Beenakker, A.F. Morpurgo, Phys. Rev. B 76, 235404 (2007)
  • 27. M. Zarenia, J.M. Pereira, Jr., F.M. Peeters, G.A. Farias, Nano Lett., to be published and arXiv:0908.2831
  • 28. P. Recher, J. Nilsson, G. Burkard, B. Trauzettel, Phys. Rev. B 79, 085407 (2009)
  • 29. T.G. Pedersen, C. Flindt, J. Pedersen, N.A. Mortensen, A.-P. Jauho, K. Pedersen, Phys. Rev. Lett. 100, 136804 (2008); M. Vanevic, V.M. Stojanovic, M. Kindermann, Phys. Rev. B 80, 045410 (2009)
  • 30. T. Shen, Y.Q. Wu, M.A. Capano, L.P. Rokhinson, L.W. Engel, P.D. Ye, Appl. Phys. Lett. 93, 122102 (2008); J. Eroms, D. Weiss, New J. Phys. 11, 095021 (2009)
  • 31. Z.F. Wang, Q.W. Shi, Q. Li, X. Wang, J.G. Hou, Appl. Phys. Lett. 91, 053109 (2007)
  • 32. Y.-W. Son, M.L. Cohen, S.G. Louie, Nature 444, 347 (2006); Y.-W. Son, M.L. Cohen, S.G. Louie, Phys. Rev. Lett. 97, 216803 (2006)
  • 33. A.R. Akhmerov, C.W.J. Beenakker, Phys. Rev. B 77, 085423 (2008)
  • 34. A. Rycerz, Phys. Status Solidi A 205, 1281 (2008)
  • 35. L. Malysheva, A. Onipko, Phys. Rev. Lett. 100, 186806 (2008); A. Onipko, Phys. Rev. B 78, 245412 (2008)
  • 36. S. Datta, Electronic Transport in Mesoscopic Systems, Cambridge University Press, Cambridge 1997
  • 37. L. Brey, H.A. Fertig, Phys. Rev. B 73, 235411 (2006); E. Prada, P. San-Jose, B. Wunsch, F. Guinea, ibid. 75, 113407 (2007); A. Rycerz, P. Recher, M. Wimmer, ibid. 80, 125417 (2009); A. Rycerz, ibid. 81, 121404(R) (2010)
  • 38. M. Wimmer, K. Richter, J. Comp. Phys. 228, 8548 (2009)
  • 39. H. Schomerus, Phys. Rev. B 76, 045433 (2007); Ya.M. Blanter, I. Martin, ibid. 76, 155433 (2007)
  • 40. T. Ando, Phys. Rev. B 44, 8017 (1991)
  • 41. A.R. Akhmerov, J.H. Bardarson, A. Rycerz, C.W.J. Beenakker, Phys. Rev. B 77, 205416 (2008)
  • 42. J. Tworzydło, C.W. Groth, C.W.J. Beenakker, Phys. Rev. B 78, 235438 (2008)
  • 43. A. Iyengar, T. Luo, H.A. Fertig, L. Brey, Phys. Rev. B 78, 235411 (2008); M.I. Katsnelson, F. Guinea, ibid. 78, 075417 (2008)
  • 44. D.A. Areshkin, C.T. White, Nano Lett. 7, 3253 (2007), and Ref. [34]
  • 45. A. Rycerz, Acta Phys. Pol. A 115, 322 (2009); J. Wurm, M. Wimmer, H.U. Baranger, K. Richter, Semicond. Sci. Technol. 25, 034003 (2010); J. Schelter, D. Bohr, B. Trauzettel, Phys. Rev. B 81, 195441 (2010)
  • 46. J. Wurm, M. Wimmer, I. Adagideli, K. Richter, H.U. Baranger, New J. Phys. 11, 095022 (2009)
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YADDA identifier
bwmeta1.element.bwnjournal-article-appv118n205kz
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