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Phys. Rev. B 75, 012105 (2007) [4 pages]

Exact analytical solution to the electronic transport in an N-coupled quantum dot array

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B. H. Teng1,*, H. K. Sy2, Z. C. Wang3, Y. Q. Sun1, and H. C. Yang1
1School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, People’s Republic of China
2Department of Physics, National University of Singapore, Kent Ridge, Singapore 117542, Republic of Singapore
3Department of Physics, Shanghai University, Shanghai 200444, People’s Republic of China

Received 26 September 2006; published 11 January 2007

Based on the exact Green’s function calculation for an N-coupled quantum dot array, the rigorous expressions for the dc current, differential conductance, and density of states, which show analytically algebraic structures, are obtained. Our new findings indicate that for the quantum transport properties there exists an optimal tunneled coupling for which the density of states of the electrons in the quantum dot is smoothened to the fullest extent and consequently the dc current and differential conductance reach their extrema.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.75.012105
DOI:
10.1103/PhysRevB.75.012105
PACS:
73.63.Kv, 02.70.Rr, 73.21.La

*Email address: phytbh@163.com (B. H. Teng).

 
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