Delay time of electron wave packet through a two-dimensional semiconductor heterostructure

X. Chen (), C.-F. Li () and Y. Ban

The European Physical Journal B: Condensed Matter and Complex Systems, 2008, vol. 62, issue 4, 453-457

Abstract: In this work, we systematically investigate the group delay time of an electron wave packet through a two-dimensional semiconductor heterostructure. It is shown that the lateral displacement, resulting from the angular spread of the electron wave packet, plays an important role in total delay time. In the propagating case, the group delay time can be negative due to the effect of lateral displacement, and is greatly enhanced by transmission resonances. In the evanescent case, the delay time saturates to a constant in the opaque limit, which is simply the Hartman effect observed for a two-dimensional situation. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2008

Keywords: 03.65.Xp Tunneling; traversal time; quantum Zeno dynamics; 73.23.-b Electronic transport in mesoscopic systems; 03.65.-w Quantum mechanics (search for similar items in EconPapers)
Date: 2008
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DOI: 10.1140/epjb/e2008-00180-3

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