RESONANT TUNNELING THROUGH COUPLED DOUBLE-QUANTUM-WELL

doi:10.1088/1004-423X/4/6/005

中国物理B ›› 1995, Vol. 4 ›› Issue (6): 434-440.doi: 10.1088/1004-423X/4/6/005

RESONANT TUNNELING THROUGH COUPLED DOUBLE-QUANTUM-WELL

林宗涵¹, 刘立军², 牛成²

(1)China Center of Advanced Science and Technology (World Laboratory), Beijing 100080, China; department of Physics, Mesoscopic Physics Laboratory, Peking University, Beijing 100871, China; Institute of Theoretical Physics, Academia Sinica, Beijing 100080, C; (2)Department of Physics, Mesoscopic Physics Laboratory, Peking University, Beijing 100871, China

收稿日期:1994-07-13 出版日期:1995-06-20 发布日期:1995-06-20
基金资助:
Project supported by the National Natural Science Foundation of China.

RESONANT TUNNELING THROUGH COUPLED DOUBLE-QUANTUM-WELL

LIU LI-JUN (刘立军)^a, NIU CHENG (牛成)^a, LIN ZONG-HAN (林宗涵)^b

^a Department of Physics, Mesoscopic Physics Laboratory, Peking University, Beijing 100871, China; ^b China Center of Advanced Science and Technology (World Laboratory), Beijing 100080, China; department of Physics, Mesoscopic Physics Laboratory, Peking University, Beijing 100871, China; Institute of Theoretical Physics, Academia Sinica, Beijing 100080, China

Received:1994-07-13 Online:1995-06-20 Published:1995-06-20
Supported by:
Project supported by the National Natural Science Foundation of China.

摘要/Abstract

摘要： A double-well resonant tunneling structure has been investigated carefully using the nonequilibrium Green's function method. We find that in the transmission probability two maxima appear even when the two levels have the same energy. This characteristic is at-tributed to the resonant tunneliug through mixed quasibound states. The tunneling current formula through this system under a dc voltage has been derived exactly. Three different cases are considered and several novel properties are found, which manifest coherent charac-teristics of the tunneling process.

Abstract: A double-well resonant tunneling structure has been investigated carefully using the nonequilibrium Green's function method. We find that in the transmission probability two maxima appear even when the two levels have the same energy. This characteristic is at-tributed to the resonant tunneliug through mixed quasibound states. The tunneling current formula through this system under a dc voltage has been derived exactly. Three different cases are considered and several novel properties are found, which manifest coherent charac-teristics of the tunneling process.

中图分类号: (Tunneling)

73.40.Gk

73.43.Jn (Tunneling) 73.63.Hs (Quantum wells) 72.10.-d (Theory of electronic transport; scattering mechanisms)

刘立军, 牛成, 林宗涵. RESONANT TUNNELING THROUGH COUPLED DOUBLE-QUANTUM-WELL[J]. 中国物理B, 1995, 4(6): 434-440.

LIU LI-JUN (刘立军), NIU CHENG (牛成), LIN ZONG-HAN (林宗涵). RESONANT TUNNELING THROUGH COUPLED DOUBLE-QUANTUM-WELL[J]. Acta Physica Sinica (Overseas Edition), 1995, 4(6): 434-440.

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RESONANT TUNNELING THROUGH COUPLED DOUBLE-QUANTUM-WELL

RESONANT TUNNELING THROUGH COUPLED DOUBLE-QUANTUM-WELL

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