Evolution and tunneling time of electron wave packets through a superlattice

Herbert P. Simanjuntak, Pedro Pereyra

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

We present a formalism to study the evolution of a wave packet inside and outside a scattering superlattice. Time series of specific Gaussian packets, centered at an arbitrary energy (formula presented) exhibit interesting back-scattering, trapping, and transmission effects. These effects depend on whether the energy (formula presented) is in a gap, coincides with a resonance, or is an arbitrary point in a band of the superlattice. The time evolution depends strongly on the transmission coefficient and on the superlattice tunneling time. We show that because of the reduced wave-packet distortion and the high intensity difference between the back-scattered and the transmitted wave, for (formula presented) in a gap, it is convenient to look at the back-scattered wave packet to study the superlattice tunneling time.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume67
Issue number4
DOIs
Publication statusPublished - 6 Jan 2003

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