Dynamical phenomena in Fibonacci semiconductor superlattices

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dc.contributor.author Diez, Enrique
dc.contributor.author Domínguez-Adame, Francisco
dc.contributor.author Maciá, Enrique
dc.contributor.author Sánchez, Angel
dc.date.accessioned 2012-09-12T12:40:46Z
dc.date.available 2012-09-12T12:40:46Z
dc.date.issued 1996-12-15
dc.identifier.bibliographicCitation Physical Review B, vol. 54, n. 23, 15 dec. 1996. Pp. 16792–16798
dc.identifier.issn 1098-0121 (print version)
dc.identifier.issn 1550-235X (online version)
dc.identifier.uri http://hdl.handle.net/10016/15306
dc.description.abstract We present a detailed study of the dynamics of electronic wave packets in Fibonacci semiconductor superlattices, both in flat band conditions and subject to homogeneous electric fields perpendicular to the layers. Coherent propagation of electrons is described by means of a scalar Hamiltonian using the effective-mass approximation. We have found that an initial Gaussian wave packet is filtered selectively when passing through the superlattice. This means that only those components of the wave packet whose wave numbers belong to allowed subminibands of the fractal-like energy spectrum can propagate over the entire superlattice. The Fourier pattern of the transmitted part of the wave packet presents clear evidences of fractality reproducing those of the underlying energy spectrum. This phenomenon persists even in the presence of unintentional disorder due to growth-induced defects. Finally, we have demonstrated that periodic coherent-field-induced oscillations ~Bloch oscillations!, which we are able to observe in our simulations of periodic superlattices, are replaced in Fibonacci superlattices by more complex oscillations displaying quasiperiodic signatures, thus shedding more light onto the very peculiar nature of the electronic states in these systems.
dc.description.sponsorship Work at Madrid and Legane´s has been supported by CICYT (Spain) under project No. MAT95-0325. Work at Los Alamos is performed under the auspices of the U.S. DOE.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher American Physical Society
dc.title Dynamical phenomena in Fibonacci semiconductor superlattices
dc.type article
dc.description.status Publicado
dc.relation.publisherversion http://dx.doi.org/10.1103/PhysRevB.54.16792
dc.subject.eciencia Matemáticas
dc.identifier.doi 10.1103/PhysRevB.54.16792
dc.rights.accessRights openAccess
dc.type.version publishedVersion
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