Volume 88, Number 3, November 2009
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||19 November 2009|
Magnetic field switching in parallel quantum dots
State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences - P.O. Box 912, Beijing 100083, China
2 National Center for Theoretical Science - Tainan, Taiwan 70101, ROC
3 Department of Physics and Center for Quantum Information Science, National Cheng Kung University Tainan, Taiwan 70101, ROC
4 Department of Particle Physics, Weizmann Institute of Science - Rehovot 76100, Israel
Corresponding author: Shmuel.Gurvitz@weizmann.ac.il
Accepted: 13 October 2009
We show that the Coulomb blockade in parallel dots pierced by magnetic flux Φ completely blocks the resonant current for any value of Φ except for integer multiples of the flux quantum . This non-analytic (switching) dependence of the current on Φ arises only when the dot states that carry the current are of the same energy. The time needed to reach the steady state, however, diverges when .
PACS: 73.23.-b – Electronic transport in mesoscopic systems / 73.23.Hk – Coulomb blockade; single-elctron tunneling / 05.60.Gg – Quantum transport
© EPLA, 2009
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