Magnetic polarization currents in double quantum dot devices

Cho, S. Y., McKenzie, R. H., Kang, K. and Kim, C. K. (2003) Magnetic polarization currents in double quantum dot devices. Journal of Physics-condensed Matter, 15 7: 1147-1154. doi:10.1088/0953-8984/15/7/311


Author Cho, S. Y.
McKenzie, R. H.
Kang, K.
Kim, C. K.
Title Magnetic polarization currents in double quantum dot devices
Journal name Journal of Physics-condensed Matter   Check publisher's open access policy
ISSN 0953-8984
Publication date 2003-01-01
Sub-type Article (original research)
DOI 10.1088/0953-8984/15/7/311
Volume 15
Issue 7
Start page 1147
End page 1154
Total pages 8
Editor A.M. Stoneham
Place of publication Bristol
Publisher Institute of Physics Publishing
Language eng
Subject C1
240202 Condensed Matter Physics - Structural Properties
780102 Physical sciences
Abstract We investigate coherent electron transport through a parallel circuit of two quantum dots (QDs), each of which has a single tunable. energy level. Electrons tunnelling via each dot from the left lead interfere with each other at the right lead. It is shown that due to the quantum interference of tunnelling electrons the double QD device is magnetically polarized by coherent circulation of electrons on the closed path through the dots and the leads. By varying the energy level of each dot one can make the magnetic states of the device be up-, non- or down-polarized. It is shown that for experimentally accessible temperatures and applied biases the magnetic polarization currents Should be sufficiently large to observe with current nanotechnology.
Keyword Physics, Condensed Matter
Aharonov-bohm Ring
Persistent Currents
Kondo Correlations
Mesoscopic Ring
Phase Evolution
Transmission
Transport
Interference
Oscillations
Coherence
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 11:52:10 EST