Extraordinary electron transmission through a periodic array of quantum dots

We study electron transmission through a periodic array of quantum dots (QD) sandwiched between doped semiconductor leads. When the Fermi wavelength of tunneling electron exceeds the array lattice constant, the off-resonant per QD conductance is enhanced by several orders of magnitude relative to th...

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Bibliographic Details
Published in:Physical review letters 2011-11, Vol.107 (19), p.196802-196802, Article 196802
Main Authors: Petrosyan, L S, Kirakosyan, A S, Shahbazyan, T V
Format: Article
Language:English
Subjects:
Algorithms
Electrons
Quantum Dots
Semiconductors
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Summary:We study electron transmission through a periodic array of quantum dots (QD) sandwiched between doped semiconductor leads. When the Fermi wavelength of tunneling electron exceeds the array lattice constant, the off-resonant per QD conductance is enhanced by several orders of magnitude relative to the single-QD conductance. The physical mechanism of the enhancement is delocalization of a small fraction of system eigenstates caused by coherent coupling of QDs via the electron continuum in the leads.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.107.196802