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The transient transmission through a quantum dot under the influence of oscillating external fields
Sun, QF; Lin, TH; Sun, QF , Peking Univ, Dept Phys, Mesoscop Phys Lab, Beijing 100871, Peoples R China.
1998
发表期刊JOURNAL OF PHYSICS-CONDENSED MATTER
ISSN0953-8984
卷号10期号:16页码:3569-3579
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.
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
关键词Double-barrier Structure Time-dependent Transport Frequencies Wells Thz
学科领域Physics
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收录类别SCI
WOS记录号WOS:000073437200010
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/12318
专题理论物理所SCI论文
通讯作者Sun, QF , Peking Univ, Dept Phys, Mesoscop Phys Lab, Beijing 100871, Peoples R China.
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GB/T 7714
Sun, QF,Lin, TH,Sun, QF , Peking Univ, Dept Phys, Mesoscop Phys Lab, Beijing 100871, Peoples R China.. 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.
APA Sun, QF,Lin, TH,&Sun, QF , Peking Univ, Dept Phys, Mesoscop Phys Lab, Beijing 100871, Peoples R China..(1998).The transient transmission through a quantum dot under the influence of oscillating external fields.JOURNAL OF PHYSICS-CONDENSED MATTER,10(16),3569-3579.
MLA Sun, QF,et al."The transient transmission through a quantum dot under the influence of oscillating external fields".JOURNAL OF PHYSICS-CONDENSED MATTER 10.16(1998):3569-3579.
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