Quantum point contact potential curvature under correlated disorder potentials
Quantum point contact potential curvature under correlated disorder potentials
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相关无序势下的量子点接触势曲率
DOI:
10.1103/physrevb.102.045305
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发表时间:
2020
影响因子:
3.7
通讯作者:
Hirayama Y.
中科院分区:
文献类型:
--
作者:
Aono T.;Takahashi M.;Fauzi M. H.;Hirayama Y.
We theoretically investigate the curvature of the confinement potential in quantum point contacts (QPCs) under a background disorder potential with Gaussian correlation functions using a noninteracting one-dimensional tight-binding model. The curvature of the potential is evaluated from the gate voltage dependence of the conductance, and the statistical average of the fitting curvature is calculated. The fitting curvature is insensitive to the original QPC confinement curvature when the characteristic length of the QPC potential is larger than the characteristic length of the disorder. In addition, the fitting curvature can be enhanced as the QPC curvature is decreased. Accidental double barrier potential formation on the top of the QPC induces enhancement of the fitting curvature. Finite-temperature effects under the disorder potential are also discussed. Similar results hold in a two-dimensional QPC tight-binding model.
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DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
N. Aoki;A. M. Burke;C. R. da Cunha;R. Akis;D. K. Ferry;Y. Ochiai
通讯作者:
Y. Ochiai
影响因子:
8.6
作者:
A. See;I. Pilgrim;B. Scannell;R. Montgomery;O. Klochan;A. Burke;M. Aagesen;P. Lindelof;I. Farrer;D. Ritchie;R. P. Taylor;A. Hamilton;A. Micolich
通讯作者:
A. Micolich
DOI:
--
发表时间:
2007
期刊:
Kotai Butsuri 42
影响因子:
--
作者:
Nobuyuki Aoki;Yuichi Ochiai
通讯作者:
Yuichi Ochiai
DOI:
10.48550/arxiv.1503.01490
发表时间:
2015
期刊:
--
影响因子:
--
作者:
Smith L
通讯作者:
Smith L
影响因子:
3.7
作者:
Smith L
通讯作者:
Smith L