Dynamical phenomena in Fibonacci semiconductor superlattices

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...

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Detalles Bibliográficos
Autores: Domínguez-Adame Acosta, Francisco, Maciá Barber, Enrique Alfonso, Sánchez, A., Díez Alcántara, Eduardo
Tipo de recurso: artículo
Fecha de publicación:1996
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/59370
Acceso en línea:https://hdl.handle.net/20.500.14352/59370
Access Level:acceso abierto
Palabra clave:538.9
Bloch Oscillations
Electronic-Properties
Thue-Morse
Localization
Transport
Spectra
Gaas
Física de materiales
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spelling Dynamical phenomena in Fibonacci semiconductor superlatticesDomínguez-Adame Acosta, FranciscoMaciá Barber, Enrique AlfonsoSánchez, A.Díez Alcántara, Eduardo538.9Bloch OscillationsElectronic-PropertiesThue-MorseLocalizationTransportSpectraGaasFísica de materialesWe 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 packer 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.American Physical SocietyUniversidad Complutense de Madrid19961996-12-1519961996-12-15journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/59370reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/593702026-06-02T12:44:21Z
dc.title.none.fl_str_mv Dynamical phenomena in Fibonacci semiconductor superlattices
title Dynamical phenomena in Fibonacci semiconductor superlattices
spellingShingle Dynamical phenomena in Fibonacci semiconductor superlattices
Domínguez-Adame Acosta, Francisco
538.9
Bloch Oscillations
Electronic-Properties
Thue-Morse
Localization
Transport
Spectra
Gaas
Física de materiales
title_short Dynamical phenomena in Fibonacci semiconductor superlattices
title_full Dynamical phenomena in Fibonacci semiconductor superlattices
title_fullStr Dynamical phenomena in Fibonacci semiconductor superlattices
title_full_unstemmed Dynamical phenomena in Fibonacci semiconductor superlattices
title_sort Dynamical phenomena in Fibonacci semiconductor superlattices
dc.creator.none.fl_str_mv Domínguez-Adame Acosta, Francisco
Maciá Barber, Enrique Alfonso
Sánchez, A.
Díez Alcántara, Eduardo
author Domínguez-Adame Acosta, Francisco
author_facet Domínguez-Adame Acosta, Francisco
Maciá Barber, Enrique Alfonso
Sánchez, A.
Díez Alcántara, Eduardo
author_role author
author2 Maciá Barber, Enrique Alfonso
Sánchez, A.
Díez Alcántara, Eduardo
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 538.9
Bloch Oscillations
Electronic-Properties
Thue-Morse
Localization
Transport
Spectra
Gaas
Física de materiales
topic 538.9
Bloch Oscillations
Electronic-Properties
Thue-Morse
Localization
Transport
Spectra
Gaas
Física de materiales
description 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 packer 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.
publishDate 1996
dc.date.none.fl_str_mv 1996
1996-12-15
1996
1996-12-15
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/59370
url https://hdl.handle.net/20.500.14352/59370
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,198674

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