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
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.
Received: 13 July 1994
Accepted manuscript online:
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
