Home > Research > Publications & Outputs > Single-parameter pumping in graphene

Electronic data

  • PhysRevB

    Rights statement: ©2011 American Physical Society

    Final published version, 855 KB, PDF document


Text available via DOI:

View graph of relations

Single-parameter pumping in graphene

Research output: Contribution to journalJournal articlepeer-review

Article number155408
<mark>Journal publication date</mark>11/10/2011
<mark>Journal</mark>Physical review B
Issue number15
Number of pages0
Publication StatusPublished
<mark>Original language</mark>English


We propose a quantum pump mechanism based on the particular properties of graphene, namely chirality and bipolarity. The underlying physics is the excitation of evanescent modes entering a potential barrier from one lead, while those from the other lead do not reach the driving region. This induces a large nonequilibrium current with electrons stemming from a broad range of energies, in contrast to the narrow resonances that govern the corresponding effect in semiconductor heterostructures. Moreover, the pump mechanism in graphene turns out to be robust, with a simple parameter dependence, which is beneficial for applications. Numerical results from a Floquet scattering formalism are complemented with analytical solutions for small to moderate driving.

Bibliographic note

©2011 American Physical Society