Electronic properties of quantum wires in surface-acoustic-wave based single-electron transport devices | Zendy

Li Hong | Zendy; Huazhong Guo | Zendy; Lü Chuan | Zendy; Li Ling | Zendy; Jie Gao | Zendy

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Electronic properties of quantum wires in surface-acoustic-wave based single-electron transport devices

Author(s) -

Li Hong,

Huazhong Guo,

Lü Chuan,

Li Ling,

Jie Gao

Publication year - 2008

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.57.5863

Subject(s) - electron , heterojunction , quantum wire , materials science , condensed matter physics , quantum , quantum point contact , quantum dot , quantum well , voltage , physics , optoelectronics , optics , quantum mechanics , laser

By fabricating a split gate on the surface of AlxGa1-xAs/GaAs heterostructurewe experimentally obtain a quasi-one-dimensional quantum wire. This structure could be used to implement single-electron transport driven by surface acoustic waves. Based on structures of conduction band and distribution of electrons in the fabricated quantum wiresthe influence of quantum-wire widths on the confining potential of the electrons is also discussed. Especiallywe numerically study how the linear electron concentration depends on the applied split-gate voltage. For the quantum wires fabricatedwe find that the calculated pinch-off voltages agree well with the relevant experimental values measured at 0.3K.

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