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Crossing and Anticrossing of Resonances: The Wannier-Stark Ladders

✍ Scribed by V. Grecchi; A. Sacchetti

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
908 KB
Volume
241
Category
Article
ISSN
0003-4916

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✦ Synopsis

In the framework of regular perturbation theory we discuss the weak field crossing behavior of the resonances in double ladder (and double well) Stark problems. We get a precise condition for the anticrossing in terms of the Agmon length of the Zener barriers. This condition has a simple physical meaning: as a general rule we have anticrossing and beating effect if the lifetime of the system is larger than the beating period. Of course, we have full delocalization in the anticrossing case only. " 1995 Academic Press, Inc.

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In this paper we compare different theoretical calculations with experimental data of anticrossings of a wide well semiconductor superlattice in the Wannier-Stark regime. Calculations have been performed by using a variation method and a numerical method. For the variation method we used different a