| 量子线中通过双杂质的共振传输 |
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| 引用本文： | 宋小龙,赵志云,汪源,施耀铭.量子线中通过双杂质的共振传输[J].上海大学学报(英文版),2003,7(4):361-365. |
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| 作者姓名： | 宋小龙 赵志云 汪源 施耀铭 |
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| 作者单位： | Department of Physics，College of Sciences，Shanghai University，Shanghai 200436，China，Department of Physics，College of Sciences，Shanghai University，Shanghai 200436，China，Department of Physics，College of Sciences，Shanghai University，Shanghai 200436，China，Department of Physics，College of Sciences，Shanghai University，Shanghai 200436，China |
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| 基金项目： | theScienceFoundationofShanghaiMunic ipalCommissionofEducation (GrantNo.99Qf5 5 ) |
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| 摘 要： | 1 Introduction Quantumtransportinmesoscopicsystemshasbeenextensivelyinvestigatedinthe pasttwodecades1] .SinceWeesetal2 ] .andWharametal3] .discoveredthe phenomenonofconductance quantizationofanelectronthroughanarrow pointcontactstructure ,therehavebeenanumberofotherworkswhichcon centratedonstudyingelectronscatteringfromimpuri tiesinanarrowquantumconductorwire .BagwellandAvishaietal4 9] .haveexaminedtheinfluencesofscatteringfromimpuritiesontheelectrontransmis sioninquantumwirebyusingthe…
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| 关 键 词： | 共振传递 狭窄量子线 Dyson方程 Green函数 电子传递 |
| 收稿时间： | 25 December 2002 |
Resonant transmission through two impurities in a narrow quantum wire |
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| Song?Xiao-Long,Zhao?Zhi-Yun,Wang?Yuan,Shi?Yao-Ming.Resonant transmission through two impurities in a narrow quantum wire[J].Journal of Shanghai University(English Edition),2003,7(4):361-365. |
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| Authors: | Song Xiao-Long Zhao Zhi-Yun Wang Yuan Shi Yao-Ming |
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| Institution: | Department of Physics, College of Sciences, Shanghai University, Shanghai 200436, China |
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| Abstract: | We study electron transmission through two impurities in a narrow quantum wire by solving Dyson’s equations for single electron
Green functions. We have verified that, for the delta-function potential of two impurities, the Green function can be factorized
into a product of the ‘free’ Green function and current transmission amplitude. Meanwhile Green function and current transmission
amplitude obey Fisher-Lee’s relation. An analytical expression of the electron transmission amplitude for intrasubband and
intersubband is obtained as a function of Fermi energy and the distance between two impurities. The resonant behavior of the
current transmission amplitude are detail discussed.
Project supported by the Science Foundation of Shanghai Municipal Commission of Education (Grant No.99Qf55) |
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| Keywords: | resonant transmission quantum wire evanescent mode |
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