TY - JOUR
T1 - Transmission through a mesoscopic ring with a quantum dot
AU - Wu, Jian
AU - Gu, Bing Lin
AU - Liu, Junjie
AU - Guo, Youjiang
AU - Zhu, Jia Lin
AU - Yu, Jing Zhi
AU - Kawazoe, Yoshiyuki
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 1999/11/1
Y1 - 1999/11/1
N2 - The transmission through a mesoscopic ring with a quantum dot embedded in one of its arms is studied with a one-dimensional scattering model. The quantum dot is approached by a quantum well scatterer. With the use of a scattering matrix describing the junctions between the leads and the ring, it is analytically shown that the quantum interference and the resonant tunneling dominate the transmission. When the state of the dot is far from a resonance, the system acts as a quantum wire with two separated stubs at both ends. However, when a resonant tunneling through the dot occurs, an extra phase shift may be introduced to the wave through the dot and then the quantum interference effect may be flipped. The dependence of the total transmission coefficient on the properties of the quantum dot is also presented.
AB - The transmission through a mesoscopic ring with a quantum dot embedded in one of its arms is studied with a one-dimensional scattering model. The quantum dot is approached by a quantum well scatterer. With the use of a scattering matrix describing the junctions between the leads and the ring, it is analytically shown that the quantum interference and the resonant tunneling dominate the transmission. When the state of the dot is far from a resonance, the system acts as a quantum wire with two separated stubs at both ends. However, when a resonant tunneling through the dot occurs, an extra phase shift may be introduced to the wave through the dot and then the quantum interference effect may be flipped. The dependence of the total transmission coefficient on the properties of the quantum dot is also presented.
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U2 - 10.1016/S0375-9601(99)00656-8
DO - 10.1016/S0375-9601(99)00656-8
M3 - Article
AN - SCOPUS:0347875962
VL - 262
SP - 245
EP - 250
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
SN - 0375-9601
IS - 2-3
ER -