Nonadiabatic rectification and current reversal in electron pumps
Journal article, 2012

Pumping of electrons through nanoscale devices is one of the fascinating achievements in the field of nanoscience with a wide range of applications. To optimize the performance of pumps, operating them at high frequencies is mandatory. We consider the influence of fast periodic driving on the average charge transferred through a quantum dot. We show that it is possible to reverse the average current by sweeping the driving frequency only. In connection with this, we observe a rectification of the average current for high frequencies. Since both effects are very robust, as corroborated by analytical results for harmonic driving, they offer a new way of controlling electron pumps.

time-dependent transport

quantum-dot

Author

Alexander Croy

Chalmers, Applied Physics, Condensed Matter Theory

U. Saalmann

Physical Review B - Condensed Matter and Materials Physics

1098-0121 (ISSN)

Vol. 86 3

Subject Categories

Physical Sciences

DOI

10.1103/PhysRevB.86.035330

More information

Created

10/7/2017