Gate driven adiabatic quantum pumping in graphene

Prada, Elsa and San Jose, Pablo and Schomerus, Henning (2011) Gate driven adiabatic quantum pumping in graphene. Solid State Communications, 151 (16). pp. 1065-1070. ISSN 0038-1098

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Abstract

We propose a new type of quantum pump made out of graphene, adiabatically driven by oscillating voltages applied to two back gates. From a practical point of view, graphene-based quantum pumps present advantages as compared to normal pumps, like enhanced robustness against thermal effects and a wider adiabatic range in driving frequency. From a fundamental point of view, apart from conventional pumping through propagating modes, graphene pumps can tap into evanescent modes, which penetrate deeply into the device as a consequence of chirality. At the Dirac point the evanescent modes dominate pumping and give rise to a universal response under weak driving for short and wide pumps, even though the charge per unit cycle is not quantized.

Item Type:
Journal Article
Journal or Publication Title:
Solid State Communications
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3104
Subjects:
ID Code:
51671
Deposited By:
Deposited On:
30 Nov 2011 09:54
Refereed?:
Yes
Published?:
Published
Last Modified:
29 Oct 2020 02:43