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The influence of gate voltage on electron transport in the graphene field-effect transistor under strong laser field is studied by using the finite-difference time-domain method. The perfect tunneling in graphene can be strongly suppressed by the strong laser field induced optical stark effect. This suppression depends not only on the laser field but also on the width and the height of the gate voltage. The electron transport through a non-square barrier is investigated. We find that a barrier with a small incline has little effect on the electron transport, but if the barrier has a large incline, the tunneling probability changes remarkably.
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Keywords:
- graphene /
- transport properties /
- finite-difference time-domain (FDTD)
[1] Novoselov K S, Geim A K, Morozov S V, Jiang D, Zhang Y, Dubonos S V, Grigorieva I V, Firsov A A 2004 Science 306 666
[2] Castro Neto A H, Guinea F, Peres N M R, Novoselov K, Geim A K 2009 Rev. Mod. Phys. 81 109
[3] Sarma S D, Shaffique A, Hwang E H, Enrico R 2011 Rev. Mod. Phys. 83 407
[4] Katsnelson M I, Novoselov K S, Geim A K 2006 Nature Physics 2 620
[5] Han M Y, Brant J C, Kim P 2010 Phys. Rev. Lett. 104 056801
[6] Zhang Z Z, Chang K, Peeters F M 2008 Phys. Rev. B 77 235411
[7] Prada E, San-Jose P, Leo'n G, Fogler M M, Guinea F 2010 Phys. Rev. B 81 161402
[8] Li Q, Cheng Z G, Li Z J,Wang Z H, Fang Y 2010 Chin. Phys. B 19 097307
[9] Xiao S, Chen J H, Adam S, Williams E D, Fuhrer M S 2010 Phys. Rev. B 82 041406
[10] Abanin D A, Levitov L S 2007 Science 317 641
[11] Son Y W, Cohen M L, Louie S G 2006 Phys. Rev. Lett. 97 216803
[12] Wang S X, Li Z W, Liu J J, Li Y X 2011 Chin. Phys. B 20 077305
[13] Wang X M, Liu H 2010 Acta Phys. Sin. 64 097103 (in Chinese) [王雪梅, 刘红 2010 64 097103]
[14] Liu J T, Su F H, Wang H, Deng X H 2011 EPL 95 24003
[15] Liu J T, Su F H, Wang H, Deng X H 2012 NJP 14 013012
[16] Calvo H L, Pastawski H M, Roche S, Torres L E F F 2011 Appl. Phys. Lett. 98 232103
[17] Savel'ev S E, Alexandrov A S 2011 Phys. Rev. B 84 035428
[18] Mele E J, Kral P, Tomanek D 2000 Phys. Rev. B 61 7669
[19] Yee K S 1966 IEEE Transactions on Antennas and Propagation 14 302
[20] Sullivan D M 2000 Electromagnetic Simulation Using the FDTD Method (Hoes Lane: Wiley-IEEE Press)
[21] Liu S B, Liu S Q 2004 Chin. Phys. 13 1892
[22] Wang H, Huang Z X, Wu X L, Ren X G 2011 Chin. Phys. B 20 114701
[23] Wu Z H, Zhai F, Peeters F M, Xu H Q, Chang K 2011 Phys. Rev. Lett. 106 176802
[24] Cheianov V V, Fal'ko V, Altshuler B L 2007 Science 315 1252
[25] Park C H, Li Y, Son Y W, Cohen M L, Louie S G 2008 Nature Physics 4 213
[26] Wu Z H, Chang K, Liu J T, Li X J, Chan K S 2009 J. Appl. Phys. 105 043702
[27] Mur G 1981 IEEE Trans. Electromagn. Compat. EMC-23 377
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[1] Novoselov K S, Geim A K, Morozov S V, Jiang D, Zhang Y, Dubonos S V, Grigorieva I V, Firsov A A 2004 Science 306 666
[2] Castro Neto A H, Guinea F, Peres N M R, Novoselov K, Geim A K 2009 Rev. Mod. Phys. 81 109
[3] Sarma S D, Shaffique A, Hwang E H, Enrico R 2011 Rev. Mod. Phys. 83 407
[4] Katsnelson M I, Novoselov K S, Geim A K 2006 Nature Physics 2 620
[5] Han M Y, Brant J C, Kim P 2010 Phys. Rev. Lett. 104 056801
[6] Zhang Z Z, Chang K, Peeters F M 2008 Phys. Rev. B 77 235411
[7] Prada E, San-Jose P, Leo'n G, Fogler M M, Guinea F 2010 Phys. Rev. B 81 161402
[8] Li Q, Cheng Z G, Li Z J,Wang Z H, Fang Y 2010 Chin. Phys. B 19 097307
[9] Xiao S, Chen J H, Adam S, Williams E D, Fuhrer M S 2010 Phys. Rev. B 82 041406
[10] Abanin D A, Levitov L S 2007 Science 317 641
[11] Son Y W, Cohen M L, Louie S G 2006 Phys. Rev. Lett. 97 216803
[12] Wang S X, Li Z W, Liu J J, Li Y X 2011 Chin. Phys. B 20 077305
[13] Wang X M, Liu H 2010 Acta Phys. Sin. 64 097103 (in Chinese) [王雪梅, 刘红 2010 64 097103]
[14] Liu J T, Su F H, Wang H, Deng X H 2011 EPL 95 24003
[15] Liu J T, Su F H, Wang H, Deng X H 2012 NJP 14 013012
[16] Calvo H L, Pastawski H M, Roche S, Torres L E F F 2011 Appl. Phys. Lett. 98 232103
[17] Savel'ev S E, Alexandrov A S 2011 Phys. Rev. B 84 035428
[18] Mele E J, Kral P, Tomanek D 2000 Phys. Rev. B 61 7669
[19] Yee K S 1966 IEEE Transactions on Antennas and Propagation 14 302
[20] Sullivan D M 2000 Electromagnetic Simulation Using the FDTD Method (Hoes Lane: Wiley-IEEE Press)
[21] Liu S B, Liu S Q 2004 Chin. Phys. 13 1892
[22] Wang H, Huang Z X, Wu X L, Ren X G 2011 Chin. Phys. B 20 114701
[23] Wu Z H, Zhai F, Peeters F M, Xu H Q, Chang K 2011 Phys. Rev. Lett. 106 176802
[24] Cheianov V V, Fal'ko V, Altshuler B L 2007 Science 315 1252
[25] Park C H, Li Y, Son Y W, Cohen M L, Louie S G 2008 Nature Physics 4 213
[26] Wu Z H, Chang K, Liu J T, Li X J, Chan K S 2009 J. Appl. Phys. 105 043702
[27] Mur G 1981 IEEE Trans. Electromagn. Compat. EMC-23 377
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