Issue
EPL
Volume 77, Number 6, March 2007
Article Number 67002
Number of page(s) 6
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI http://dx.doi.org/10.1209/0295-5075/77/67002
Published online 02 March 2007
EPL, 77 (2007) 67002
DOI: 10.1209/0295-5075/77/67002

Theory of one-dimensional double-barrier quantum pump in two-frequency signal regime

M. M. Mahmoodian and M. V. Entin

Institute of Semiconductor Physics, Siberian Division, Russian Academy of Sciences - Novosibirsk, 630090 Russia

mahmood@isp.nsc.ru
entin@isp.nsc.ru

received 8 December 2006; accepted in final form 2 February 2007; published March 2007
published online 2 March 2007

Abstract
A one-dimensional quantum pump with oscillating double $\delta $-like barriers/wells is studied. We assume that the oscillations contain two frequencies $\omega $ and $2\omega $. The alternating signal leads to the direct current across the structure even in a symmetric system. The properties of this quantum pump are studied in a wide range of the system parameters.

PACS
73.23.-b - Electronic transport in mesoscopic systems.
73.50.Pz - Photoconduction and photovoltaic effects.
85.35.Be - Quantum well devices (quantum dots, quantum wires, etc.).

© Europhysics Letters Association 2007