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Title: Transmission coefficient, resonant tunneling lifetime and traversal time in multibarrier semiconductor heterostructure
Authors: Nanda, J
Mahapatra, P K
Roy, C L
Keywords: Multibarrier resonant tunneling
Transmission coefficient
Tunneling lifetime
Group velocity
Traversal time
Surface state
Issue Date: 2006
Publisher: Elsevier
Citation: Physica B: Condensed Matter (Accepted Postprint)
Abstract: A computational model based on non-relativistic approach is proposed for the determination of transmission coefficient, resonant tunneling energies, group velocity, resonant tunneling lifetime and traversal time in multibarrier systems (GaAs/AlyGa1−yAs) for the entire energy range ε<V0, ε=V0 and ε>V0, V0, being the potential barrier height. The resonant energy states were found to group into allowed tunneling bands separated by forbidden gaps. The tunneling lifetime and the traversal time are found to have minimum values at the middle of each allowed band. Further, It is observed that the electrons with energies in the higher tunneling band could tunnel out faster than those with energies in the lower band. Moreover, an additional resonant peak in resonant energy spectrum indicated the presence of a surface state where resonant tunneling occurs
Description: Copyright for this article belongs to Elsevier Science Ltd doi:10.1016/j.physb.2006.03.021
Appears in Collections:Journal Articles

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