栅极电势对强光场下石墨烯场效应管中电子隧穿的影响

刘江涛; 黄接辉; 肖文波; 胡爱荣; 王建辉

doi:10.7498/aps.61.177202

摘要

利用时域有限差分方法研究了强光场下石墨烯场效应管中栅极电势对电子隧穿的影响. 在强光场下由于光学stark效应,石墨烯场效应管的完美手征透射被抑制.这种抑制除了可以利用光场来调控外,也可以通过改变栅极电势的宽度、势垒高度等来调控. 研究了非方势垒中电子的隧穿. 研究发现,当电势的倾斜较小时,电子隧穿概率变化不大.而当电势倾斜很大时,电子隧穿概率急剧改变.

关键词:

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.

Keywords:

作者及机构信息

1.
南昌大学物理系, 南昌 330031;

2.
南昌航空大学无损检测技术教育部重点实验室, 南昌 330063

基金项目: 国家自然科学基金(批准号: 10904059, 11174118, 11147200); 江西省自然科学基金(批准号: 2009GQW0017); 航空科学基金(批准号: 2010ZB56004); 江西省教育厅基金(批准号: GJJ11176)和无损检测技术教育部重点实验室开放基金 (批准号: ZD201029005)资助的课题.

Authors and contacts

1.
Department of Physics, Nanchang University, Nanchang 330031, China;

2.
Key Laboratory of Nondestructive Testing (Ministry of Education), Nanchang Hangkong University, Nanchang 330063, China

Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 10904059, 11174118, 11147200), the Natural Science Foundation of Jiangxi Province (Grant No. 2009GQW0017), the Aeronautical Science Foundation of China (Grant No. 2010ZB56004), the Scientific Research Foundation of Jiangxi Provincial Department of Education (Grant No. GJJ11176), and the Open Fund of the Key Laboratory of Nondestructive Testing (Ministry of Education, Nanchang Hangkong University) (Grant No. ZD201029005).

参考文献

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[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
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[14]	Liu J T, Su F H, Wang H, Deng X H 2011 EPL 95 24003
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[21]	Liu S B, Liu S Q 2004 Chin. Phys. 13 1892
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[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
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施引文献

[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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