Calculation of direct and indirect excitons in GaAs/Ga1−xAlxAs coupled double quantum wells : the effects of in-plane magnetic fields and growth-direction electric fields
ABSTRACT: The variational procedure, in the effective-mass and parabolic-band approximations, is used in order to investigate the effects of crossed electric and magnetic fields on the exciton states in GaAs/Ga1−xAlxAs coupled double quantum wells. Calculations are performed for double quantum wells...
- Autores:
-
de Dios Leiva, Melquiades
Duque Echeverri, Carlos Alberto
Oliveira, Luiz Eduardo
- Tipo de recurso:
- Article of investigation
- Fecha de publicación:
- 2007
- Institución:
- Universidad de Antioquia
- Repositorio:
- Repositorio UdeA
- Idioma:
- eng
- OAI Identifier:
- oai:bibliotecadigital.udea.edu.co:10495/8297
- Acceso en línea:
- http://hdl.handle.net/10495/8297
- Palabra clave:
- Campos electromagnéticos
Electromagnetic fields
Pozos cuánticos
Quantum wells
Banda parabólica
Excitón en GaAs
- Rights
- openAccess
- License
- http://creativecommons.org/licenses/by-nc-nd/2.5/co/
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| dc.title.spa.fl_str_mv |
Calculation of direct and indirect excitons in GaAs/Ga1−xAlxAs coupled double quantum wells : the effects of in-plane magnetic fields and growth-direction electric fields |
| title |
Calculation of direct and indirect excitons in GaAs/Ga1−xAlxAs coupled double quantum wells : the effects of in-plane magnetic fields and growth-direction electric fields |
| spellingShingle |
Calculation of direct and indirect excitons in GaAs/Ga1−xAlxAs coupled double quantum wells : the effects of in-plane magnetic fields and growth-direction electric fields Campos electromagnéticos Electromagnetic fields Pozos cuánticos Quantum wells Banda parabólica Excitón en GaAs |
| title_short |
Calculation of direct and indirect excitons in GaAs/Ga1−xAlxAs coupled double quantum wells : the effects of in-plane magnetic fields and growth-direction electric fields |
| title_full |
Calculation of direct and indirect excitons in GaAs/Ga1−xAlxAs coupled double quantum wells : the effects of in-plane magnetic fields and growth-direction electric fields |
| title_fullStr |
Calculation of direct and indirect excitons in GaAs/Ga1−xAlxAs coupled double quantum wells : the effects of in-plane magnetic fields and growth-direction electric fields |
| title_full_unstemmed |
Calculation of direct and indirect excitons in GaAs/Ga1−xAlxAs coupled double quantum wells : the effects of in-plane magnetic fields and growth-direction electric fields |
| title_sort |
Calculation of direct and indirect excitons in GaAs/Ga1−xAlxAs coupled double quantum wells : the effects of in-plane magnetic fields and growth-direction electric fields |
| dc.creator.fl_str_mv |
de Dios Leiva, Melquiades Duque Echeverri, Carlos Alberto Oliveira, Luiz Eduardo |
| dc.contributor.author.none.fl_str_mv |
de Dios Leiva, Melquiades Duque Echeverri, Carlos Alberto Oliveira, Luiz Eduardo |
| dc.contributor.researchgroup.spa.fl_str_mv |
Grupo de Materia Condensada-UdeA |
| dc.subject.lemb.none.fl_str_mv |
Campos electromagnéticos Electromagnetic fields Pozos cuánticos Quantum wells |
| topic |
Campos electromagnéticos Electromagnetic fields Pozos cuánticos Quantum wells Banda parabólica Excitón en GaAs |
| dc.subject.proposal.spa.fl_str_mv |
Banda parabólica Excitón en GaAs |
| description |
ABSTRACT: The variational procedure, in the effective-mass and parabolic-band approximations, is used in order to investigate the effects of crossed electric and magnetic fields on the exciton states in GaAs/Ga1−xAlxAs coupled double quantum wells. Calculations are performed for double quantum wells under applied magnetic fields parallel to the layers and electric fields in the growth direction. The exciton envelope wave function is obtained through a variational procedure using a hydrogenic 1s-like wave function and an expansion in a complete set of trigonometric functions for the electron and hole wave functions. We take into account intersubband mixing brought about by the Coulomb interaction of electron-hole pairs in double quantum wells and present a detailed analysis of the properties of direct and indirect exciton states in these systems. The present study clearly reveals anticrossing effects on the dispersion with applied voltage or growth-direction electric field of the photoluminescence peaks associated with direct and indirect excitons. Calculated results are found in good agreement with available experimental measurements on the photoluminescence peak position associated with direct and indirect excitons in GaAs-Ga1−xAlxAs double quantum wells under growthdirection applied electric fields or under applied in-plane magnetic fields. |
| publishDate |
2007 |
| dc.date.issued.none.fl_str_mv |
2007 |
| dc.date.accessioned.none.fl_str_mv |
2017-09-21T21:46:02Z |
| dc.date.available.none.fl_str_mv |
2017-09-21T21:46:02Z |
| dc.type.spa.fl_str_mv |
Artículo de investigación |
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http://purl.org/coar/resource_type/c_2df8fbb1 |
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https://purl.org/redcol/resource_type/ART |
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http://purl.org/coar/version/c_970fb48d4fbd8a85 |
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info:eu-repo/semantics/article |
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info:eu-repo/semantics/publishedVersion |
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http://purl.org/coar/resource_type/c_2df8fbb1 |
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publishedVersion |
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de Dios Leiva, M., Duque Echeverri, C. A., & Oliveira, L. E. (2007). Calculation of direct and indirect excitons in GaAs/Ga1−xAlxAs coupled double quantum wells: The effects of in-plane magnetic fields and growth-direction electric fields. Physical Review, B. 76(7), 75303-75309 |
| dc.identifier.issn.none.fl_str_mv |
163-1829 |
| dc.identifier.uri.none.fl_str_mv |
http://hdl.handle.net/10495/8297 |
| dc.identifier.doi.none.fl_str_mv |
10.1103/PhysRevB.76.075303 |
| identifier_str_mv |
de Dios Leiva, M., Duque Echeverri, C. A., & Oliveira, L. E. (2007). Calculation of direct and indirect excitons in GaAs/Ga1−xAlxAs coupled double quantum wells: The effects of in-plane magnetic fields and growth-direction electric fields. Physical Review, B. 76(7), 75303-75309 163-1829 10.1103/PhysRevB.76.075303 |
| url |
http://hdl.handle.net/10495/8297 |
| dc.language.iso.spa.fl_str_mv |
eng |
| language |
eng |
| dc.relation.ispartofjournalabbrev.spa.fl_str_mv |
Phys Rev B |
| dc.relation.citationendpage.spa.fl_str_mv |
75309 |
| dc.relation.citationissue.spa.fl_str_mv |
7 |
| dc.relation.citationstartpage.spa.fl_str_mv |
75303 |
| dc.relation.citationvolume.spa.fl_str_mv |
76 |
| dc.relation.ispartofjournal.spa.fl_str_mv |
Physical Review B: Condensed Matter |
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http://creativecommons.org/licenses/by-nc-nd/2.5/co/ |
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https://creativecommons.org/licenses/by-nc-nd/4.0/ |
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Atribución-NoComercial-SinDerivadas 2.5 Colombia |
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de Dios Leiva, MelquiadesDuque Echeverri, Carlos AlbertoOliveira, Luiz EduardoGrupo de Materia Condensada-UdeA2017-09-21T21:46:02Z2017-09-21T21:46:02Z2007de Dios Leiva, M., Duque Echeverri, C. A., & Oliveira, L. E. (2007). Calculation of direct and indirect excitons in GaAs/Ga1−xAlxAs coupled double quantum wells: The effects of in-plane magnetic fields and growth-direction electric fields. Physical Review, B. 76(7), 75303-75309163-1829http://hdl.handle.net/10495/829710.1103/PhysRevB.76.075303ABSTRACT: The variational procedure, in the effective-mass and parabolic-band approximations, is used in order to investigate the effects of crossed electric and magnetic fields on the exciton states in GaAs/Ga1−xAlxAs coupled double quantum wells. Calculations are performed for double quantum wells under applied magnetic fields parallel to the layers and electric fields in the growth direction. The exciton envelope wave function is obtained through a variational procedure using a hydrogenic 1s-like wave function and an expansion in a complete set of trigonometric functions for the electron and hole wave functions. We take into account intersubband mixing brought about by the Coulomb interaction of electron-hole pairs in double quantum wells and present a detailed analysis of the properties of direct and indirect exciton states in these systems. The present study clearly reveals anticrossing effects on the dispersion with applied voltage or growth-direction electric field of the photoluminescence peaks associated with direct and indirect excitons. Calculated results are found in good agreement with available experimental measurements on the photoluminescence peak position associated with direct and indirect excitons in GaAs-Ga1−xAlxAs double quantum wells under growthdirection applied electric fields or under applied in-plane magnetic fields.COL0033319application/pdfengThe American Physical SocietyEstados Unidoshttp://creativecommons.org/licenses/by-nc-nd/2.5/co/https://creativecommons.org/licenses/by-nc-nd/4.0/Atribución-NoComercial-SinDerivadas 2.5 Colombiainfo:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Calculation of direct and indirect excitons in GaAs/Ga1−xAlxAs coupled double quantum wells : the effects of in-plane magnetic fields and growth-direction electric fieldsArtículo de investigaciónhttp://purl.org/coar/resource_type/c_2df8fbb1https://purl.org/redcol/resource_type/ARThttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionCampos electromagnéticosElectromagnetic fieldsPozos cuánticosQuantum wellsBanda parabólicaExcitón en GaAsPhys Rev B7530977530376Physical Review B: Condensed MatterPublicationORIGINALDuqueCarlos_2007_CalculationDirectIndirect.pdfDuqueCarlos_2007_CalculationDirectIndirect.pdfArtículo de investigaciónapplication/pdf214610https://bibliotecadigital.udea.edu.co/bitstreams/d634168e-16d6-4ad7-a027-5218ccc934b7/download21d3863d8d5138f37c26ca7cc31ebaceMD51trueAnonymousREADCC-LICENSElicense_urllicense_urltext/plain; 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