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题名: The transient transmission through a quantum dot under the influence of oscillating external fields
作者: Sun, QF ;  Lin, TH
刊名: JOURNAL OF PHYSICS-CONDENSED MATTER
出版日期: 1998
卷号: 10, 期号:16, 页码:3569-3579
关键词: DOUBLE-BARRIER STRUCTURE ;  TIME-DEPENDENT TRANSPORT ;  FREQUENCIES ;  WELLS ;  THZ
学科分类: Physics
通讯作者: Sun, QF , Peking Univ, Dept Phys, Mesoscop Phys Lab, Beijing 100871, Peoples R China.
部门归属: Peking Univ, Dept Phys, Mesoscop Phys Lab, Beijing 100871, Peoples R China; Chinese Ctr Adv Sci & Technol, World Lab, Beijing 100080, Peoples R China; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: We consider a quantum dot coupled to two leads in the presence of oscillating external fields applied to the dot and the two leads. Using the nonequilibrium-Green-function method, the formula for the transient transmission probability (TTP) T-epsilon f,T-epsilon i (t', t) is derived. The numerical studies reveal the following facts. When t' - t similar to 1/Gamma (Gamma is the full width of the resonant state), no visible resonant tunnelling behaviour occurs, and T-epsilon f,T-epsilon i(t', t) strongly depends on the time at which the electron enters the dot, t, and that at which it exits from it, t'; when t'-t much greater than 1/Gamma, the resonant tunnelling becomes striking, and T-epsilon f,T-epsilon i (t', t) depends only weakly on t and t'. The conventional transmission probability T-epsilon f,T-epsilon i, defined as the limit as t --> -infinity and t' -->+infinity, has a very rich spectrum and exhibits a simultaneous quenching of some channels. On the basis of the properties of T-epsilon f,T-epsilon i, the condition for the occurrence of an electron-photon pump has also been discussed.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000073437200010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/12318
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Sun, QF,Lin, TH. The transient transmission through a quantum dot under the influence of oscillating external fields[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,1998,10(16):3569-3579.
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