Quantum pumping in graphene.

Prada, E. and San-Jose, P. and Schomerus, Henning (2009) Quantum pumping in graphene. Physical review B, 80 (24). p. 245414. ISSN 1550-235X

[img]
Preview
PDF (0907.1568v2.pdf)
0907.1568v2.pdf

Download (864kB)

Abstract

We show that graphene-based quantum pumps can tap into evanescent modes, which penetrate deeply into the device as a consequence of Klein tunneling. The evanescent modes dominate pumping at the Dirac point, and give rise to a universal response under weak driving for short and wide pumps, in close analogy to their role in the minimal conductivity in ballistic transport. In contrast, evanescent modes contribute negligibly to normal pumps. Our findings add an incentive for the exploration of graphene-based nanoelectronic devices.

Item Type:
Journal Article
Journal or Publication Title:
Physical review B
Additional Information:
© 2009 The American Physical Society
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
ID Code:
31992
Deposited By:
Deposited On:
04 Mar 2010 11:24
Refereed?:
Yes
Published?:
Published
Last Modified:
04 Jul 2020 00:39