CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
|
|
|
|
Single-Parameter Quantum Pumping in Graphene Nanoribbons with Staggered Sublattice Potential |
Yan-Hua Li, Yong-Jian Xiong** |
Department of Physics, Ningbo University, Ningbo 315211
|
|
Cite this article: |
Yan-Hua Li, Yong-Jian Xiong 2017 Chin. Phys. Lett. 34 057201 |
|
|
Abstract We present a theoretical study of quantum charge pumping in metallic armchair graphene nanoribbons using the Floquet–Green function method. A central part of the ribbon acting as the scattering region is supposed to have staggered sublattice potential to open a finite band gap. A single ac gate is asymmetrically applied to a part of the scattering region to drive the pumping. Corresponding to the gap edges, there are two pumped current peaks with opposite current directions, which can be reversed by changing the position of the ac gate relative to the scattering region. The effects of the parameters, such as the staggered sublattice potential, the driving frequency and the geometric parameters of the structure, on the pumping are discussed.
|
|
Received: 04 February 2017
Published: 29 April 2017
|
|
PACS: |
72.80.Vp
|
(Electronic transport in graphene)
|
|
73.23.-b
|
(Electronic transport in mesoscopic systems)
|
|
73.23.Ad
|
(Ballistic transport)
|
|
|
Fund: Supported by the K. C. Wong Magna Fund in Ningbo University, and the National Natural Science Foundation of China under Grant No 11474174. |
|
|
[1] | Kohler S, Lehmann J and Hänggi P 2005 Phys. Rep. 406 379 | [2] | Thouless D J 1983 Phys. Rev. B 27 6083 | [3] | Brouwer P W 1998 Phys. Rev. B 58 R10135 | [4] | Moskalets M and Büttiker M 2002 Phys. Rev. B 66 035306 | [5] | Altshuler B L and Glazman L I 1999 Science 283 1864 | [6] | Switkes M, Marcus C M, Campman K and Gossard A C 1999 Science 283 1905 | [7] | Wang B, Wang J and Guo H 2002 Phys. Rev. B 65 073306 | [8] | Foa Torres L E F 2005 Phys. Rev. B 72 245339 | [9] | Blumenthal M D, Kaestner B, Li L, Giblin S, Janssen T J B M, Pepper M, Anderson D, Jones G and Ritchie D A 2007 Nat. Phys. 3 343 | [10] | Kaestner B, Kashcheyevs V, Amakawa S, Blumenthal M D, Li L, Janssen T J B M, Hein G, Pierz K, Weimann T, Siegner U and Schumacher H W 2008 Appl. Phys. Lett. 92 192106 | [11] | Fujiwara A, Nishiguchi K and Ono Y 2008 Appl. Phys. Lett. 92 042102 | [12] | Kaestner B, Leicht C, Kashcheyevs V, Pierz K, Siegner U and Schumacher H W 2009 Appl. Phys. Lett. 94 012106 | [13] | Prada E, San-Jose P and Schomerus H 2009 Phys. Rev. B 80 245414 | [14] | Zhu R and Chen H 2009 Appl. Phys. Lett. 95 122111 | [15] | Grichuk E and Manykin E 2010 Europhys. Lett. 92 47010 | [16] | Alos-Palop M and Blaauboer M 2011 Phys. Rev. B 84 073402 | [17] | Ingaramo L H and Foa Torres L E F 2013 Appl. Phys. Lett. 103 123508 | [18] | Zhang L 2015 Chin. Phys. B 24 117202 | [19] | Foa Torres L E F, Calvo H L, Rocha C G and Cuniberti G 2011 Appl. Phys. Lett. 99 092102 | [20] | San-Jose P, Prada E, Kohler S and Schomerus H 2011 Phys. Rev. B 84 155408 | [21] | Zhou Y and Wu M W 2012 Phys. Rev. B 86 085406 | [22] | Grichuka E and Manykin E 2013 Eur. Phys. J. B 86 210 | [23] | Rahimi M A and Moghaddam A G 2015 J. Phys. D 48 295004 | [24] | Cheraghchi H 2016 J. Magn. Mater. 398 264 | [25] | Benjamin C 2013 Appl. Phys. Lett. 103 043120 | [26] | Connolly M R, Chiu K L, Giblin S P, Kataoka M, Fletcher J D, Chua C, Griffiths J P, Jones G A C, Fal'ko V I, Smith C G and Janssen T J B M 2013 Nat. Nanotechnol. 8 417 | [27] | Evelt M et al 2017 Phys. Rev. B 95 024408 | [28] | Zhou S Y, Gweon G H, Fedorov A V, First P N, de Heer W A, Lee D H, Guinea F, Castro Neto A H and Lanzara A 2007 Nat. Mater. 6 770 | [29] | Sachs B, Wehling T O, Katsnelson M I and Lichtenstein A I 2016 Phys. Rev. B 94 224105 | [30] | Giovannetti G, Khomyakov P A, Brocks G, Kelly P J and van den Brink J 2007 Phys. Rev. B 76 073103 | [31] | Xu H, Heinzel T, Evaldsson M and Zozoulenko I V 2008 Phys. Rev. B 77 245401 | [32] | Xiong Y J and Xiong B K 2011 J. Appl. Phys. 109 103707 | [33] | Zhao P and Guo J 2009 J. Appl. Phys. 105 034503 | [34] | Rocha C G, Foa Torres L E F and Cuniberti G 2010 Phys. Rev. B 81 115435 | [35] | Gu Y, Yang Y H, Wang J and Chan K S 2009 J. Phys.: Condens. Matter 21 405301 |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|