[1] Novoselov K S, Geim A K, Morozov S V, Jiang D, Zhang Y, Dubonos S V, Grigorieva I V and Firsov A A 2004 Science 306 666 [2] Novoselov K S, Geim A K, Morozov S V, Jiang D, Katsnelson M I, Grigorieva I V, Dubonos S V and Firsov A A 2005 Nature 438 197 [3] Zhang Y, Tan Y-W, Stormer H L and Kim P 2005 Nature 438 201 [4] Barbier M, Peeters F M, Vasilopoulos P and Pereira J M Jr 2008 Phys. Rev. B 77 115446 [5] Neto A H C, Guinea F, Peres N M R, Novoselov K S and Geim A K 2009 Rev. Mod. Phys. 81 109 [6] Leenaerts O, Partoens B and Peeters F M 2008 Appl. Phys. Lett. 93 193107 [7] Ponomarenko L A, Schedin F, Katsnelson M I, Yang R, Hill E W, Novoselov K S and Geim A K 2008 Science 320 356 Stampfer C, Schurtenberger E, Molitor F, Guttinger J, Ihn T and Ensslin K 2009 Nano Lett. 8 2378 [8] Raoux A, Polini M, Asgari R, Hamilton A R, Fazio R and MacDonald A H 2010 Phys. Rev. B 81 073407 [9] Concha A and Tešanović Z 2010 Phys. Rev. B 82 033413 [10] Peres N M R 2009 J. Phys.: Condens. Matter 21 095501 IOP Article Juan F, Cortijo A and Vozmediano M A H 2007 Phys. Rev. B 76 165409 [11] Tapasztó L, Dobrik G, Nemes-Incze P, Vertesy G, Lambin Ph and Biró L P 2008 Phys. Rev. B 78 233407 [12] Gibertini M, Singha A, Pellegrini V, Polini M, Vignale G, Pinczuk A, Pfeiffer L N and West K W 2009 Phys. Rev. B 79 241406(R) [13] Park C-H, Yang L, Son Y-W, Cohen M L and Louie S G 2008 Nat. Phys. 4 213 [14] Park C-H, Son Y-W, Yang L, Cohen M L and Louie S G 2008 Nano Lett. 8 2920 [15] Brey L and Fertig H A 2009 Phys. Rev. Lett. 103 046809 [16] Ho J H, Chiu Y H, Tsai S J and Lin M F 2009 Phys. Rev. B 79 115427 [17] Barbier M, Vasilopoulos P and Peeters F M 2010 Phil. Trans. R. Soc. A 368 5499 [18] Chen X, Tao J-W and Ban Y 2011 Eur. Phys. J. B 70 203 (arXiv:1004.0350v1 [cond-mat]) [19] Merzbacher E 1998 Quantum Mechanics (New York: Wiley) [20] Pereira J M Jr, Vasilopoulos P and Peeters F M 2007 Appl. Phys. Lett. 90 132122 [21] Wang L-G and Zhu S-Y 2010 Phys. Rev. B 81 205444 [22] Barbier M, Vasilopoulos P and Peeters F M 2010 Phys. Rev. B 81 075438