Shallow Donor Impurity States with Excitonic Contribution in GaAs/AlGaAs and CdTe/CdSe Truncated Conical Quantum Dots under Applied Magnetic Field
ABSTRACT: Using the effective mass approximation in a parabolic two-band model, we studied the effects of the geometrical parameters, on the electron and hole states, in two truncated conical quantum dots: (i) GaAs-(Ga,Al)As in the presence of a shallow donor impurity and under an applied magnetic f...
- Autores:
-
Pulgar Velásquez, Lorenz
Gil Corrales, John Alexander
Duque Echeverri, Carlos Alberto
Morales Aramburo, Álvaro Luis
Sierra Ortega, José
Vinasco Suárez, Juan Alejandro
Laroze, David
Radu, Adrian
Kasapoglu, Esin
Restrepo Arango, Ricardo León
- Tipo de recurso:
- Article of investigation
- Fecha de publicación:
- 2021
- Institución:
- Universidad de Antioquia
- Repositorio:
- Repositorio UdeA
- Idioma:
- eng
- OAI Identifier:
- oai:bibliotecadigital.udea.edu.co:10495/26172
- Acceso en línea:
- http://hdl.handle.net/10495/26172
- Palabra clave:
- Truncated conical quantum dots
Puntos cuánticos cónicos truncados
Exciton states
Estados de excitón
Donor-impurity states
Applied magnetic field
Type II quantum dots
- Rights
- openAccess
- License
- http://creativecommons.org/licenses/by/2.5/co/
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| dc.title.spa.fl_str_mv |
Shallow Donor Impurity States with Excitonic Contribution in GaAs/AlGaAs and CdTe/CdSe Truncated Conical Quantum Dots under Applied Magnetic Field |
| title |
Shallow Donor Impurity States with Excitonic Contribution in GaAs/AlGaAs and CdTe/CdSe Truncated Conical Quantum Dots under Applied Magnetic Field |
| spellingShingle |
Shallow Donor Impurity States with Excitonic Contribution in GaAs/AlGaAs and CdTe/CdSe Truncated Conical Quantum Dots under Applied Magnetic Field Truncated conical quantum dots Puntos cuánticos cónicos truncados Exciton states Estados de excitón Donor-impurity states Applied magnetic field Type II quantum dots |
| title_short |
Shallow Donor Impurity States with Excitonic Contribution in GaAs/AlGaAs and CdTe/CdSe Truncated Conical Quantum Dots under Applied Magnetic Field |
| title_full |
Shallow Donor Impurity States with Excitonic Contribution in GaAs/AlGaAs and CdTe/CdSe Truncated Conical Quantum Dots under Applied Magnetic Field |
| title_fullStr |
Shallow Donor Impurity States with Excitonic Contribution in GaAs/AlGaAs and CdTe/CdSe Truncated Conical Quantum Dots under Applied Magnetic Field |
| title_full_unstemmed |
Shallow Donor Impurity States with Excitonic Contribution in GaAs/AlGaAs and CdTe/CdSe Truncated Conical Quantum Dots under Applied Magnetic Field |
| title_sort |
Shallow Donor Impurity States with Excitonic Contribution in GaAs/AlGaAs and CdTe/CdSe Truncated Conical Quantum Dots under Applied Magnetic Field |
| dc.creator.fl_str_mv |
Pulgar Velásquez, Lorenz Gil Corrales, John Alexander Duque Echeverri, Carlos Alberto Morales Aramburo, Álvaro Luis Sierra Ortega, José Vinasco Suárez, Juan Alejandro Laroze, David Radu, Adrian Kasapoglu, Esin Restrepo Arango, Ricardo León |
| dc.contributor.author.none.fl_str_mv |
Pulgar Velásquez, Lorenz Gil Corrales, John Alexander Duque Echeverri, Carlos Alberto Morales Aramburo, Álvaro Luis Sierra Ortega, José Vinasco Suárez, Juan Alejandro Laroze, David Radu, Adrian Kasapoglu, Esin Restrepo Arango, Ricardo León |
| dc.contributor.researchgroup.spa.fl_str_mv |
Grupo de Materia Condensada-UdeA |
| dc.subject.proposal.spa.fl_str_mv |
Truncated conical quantum dots Puntos cuánticos cónicos truncados Exciton states Estados de excitón Donor-impurity states Applied magnetic field Type II quantum dots |
| topic |
Truncated conical quantum dots Puntos cuánticos cónicos truncados Exciton states Estados de excitón Donor-impurity states Applied magnetic field Type II quantum dots |
| description |
ABSTRACT: Using the effective mass approximation in a parabolic two-band model, we studied the effects of the geometrical parameters, on the electron and hole states, in two truncated conical quantum dots: (i) GaAs-(Ga,Al)As in the presence of a shallow donor impurity and under an applied magnetic field and (ii) CdSe–CdTe core–shell type-II quantum dot. For the first system, the impurity position and the applied magnetic field direction were chosen to preserve the system’s azimuthal symmetry. The finite element method obtains the solution of the Schrödinger equations for electron or hole with or without impurity with an adaptive discretization of a triangular mesh. The interaction of the electron and hole states is calculated in a first-order perturbative approximation. This study shows that the magnetic field and donor impurities are relevant factors in the optoelectronic properties of conical quantum dots. Additionally, for the CdSe–CdTe quantum dot, where, again, the axial symmetry is preserved, a switch between direct and indirect exciton is possible to be controlled through geometry. |
| publishDate |
2021 |
| dc.date.issued.none.fl_str_mv |
2021 |
| dc.date.accessioned.none.fl_str_mv |
2022-02-24T14:45:04Z |
| dc.date.available.none.fl_str_mv |
2022-02-24T14:45:04Z |
| 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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Pulgar-Velásquez, L.; Sierra-Ortega, J.; Vinasco, J.A.; Laroze, D.; Radu, A.; Kasapoglu, E.; Restrepo, R.L.; Gil-Corrales, J.A.; Morales, A.L.; Duque, C.A. Shallow Donor Impurity States with Excitonic Contribution in GaAs/AlGaAs and CdTe/CdSe Truncated Conical Quantum Dots under Applied Magnetic Field. Nanomaterials 2021, 11, 2832. https://doi.org/10.3390/ nano11112832 |
| dc.identifier.uri.none.fl_str_mv |
http://hdl.handle.net/10495/26172 |
| dc.identifier.doi.none.fl_str_mv |
10.3390/nano11112832 |
| dc.identifier.eissn.none.fl_str_mv |
2079-4991 |
| identifier_str_mv |
Pulgar-Velásquez, L.; Sierra-Ortega, J.; Vinasco, J.A.; Laroze, D.; Radu, A.; Kasapoglu, E.; Restrepo, R.L.; Gil-Corrales, J.A.; Morales, A.L.; Duque, C.A. Shallow Donor Impurity States with Excitonic Contribution in GaAs/AlGaAs and CdTe/CdSe Truncated Conical Quantum Dots under Applied Magnetic Field. Nanomaterials 2021, 11, 2832. https://doi.org/10.3390/ nano11112832 10.3390/nano11112832 2079-4991 |
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http://hdl.handle.net/10495/26172 |
| dc.language.iso.spa.fl_str_mv |
eng |
| language |
eng |
| dc.relation.ispartofjournalabbrev.spa.fl_str_mv |
Nanomaterials |
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19 |
| dc.relation.citationissue.spa.fl_str_mv |
11 |
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1 |
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11 |
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Nanomaterials |
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http://creativecommons.org/licenses/by/2.5/co/ |
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https://creativecommons.org/licenses/by/4.0/ |
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Atribución 2.5 Colombia |
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info:eu-repo/semantics/openAccess |
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http://purl.org/coar/access_right/c_abf2 |
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http://creativecommons.org/licenses/by/2.5/co/ https://creativecommons.org/licenses/by/4.0/ Atribución 2.5 Colombia http://purl.org/coar/access_right/c_abf2 |
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openAccess |
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application/pdf |
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Pulgar Velásquez, LorenzGil Corrales, John AlexanderDuque Echeverri, Carlos AlbertoMorales Aramburo, Álvaro LuisSierra Ortega, JoséVinasco Suárez, Juan AlejandroLaroze, DavidRadu, AdrianKasapoglu, EsinRestrepo Arango, Ricardo LeónGrupo de Materia Condensada-UdeA2022-02-24T14:45:04Z2022-02-24T14:45:04Z2021Pulgar-Velásquez, L.; Sierra-Ortega, J.; Vinasco, J.A.; Laroze, D.; Radu, A.; Kasapoglu, E.; Restrepo, R.L.; Gil-Corrales, J.A.; Morales, A.L.; Duque, C.A. Shallow Donor Impurity States with Excitonic Contribution in GaAs/AlGaAs and CdTe/CdSe Truncated Conical Quantum Dots under Applied Magnetic Field. Nanomaterials 2021, 11, 2832. https://doi.org/10.3390/ nano11112832http://hdl.handle.net/10495/2617210.3390/nano111128322079-4991ABSTRACT: Using the effective mass approximation in a parabolic two-band model, we studied the effects of the geometrical parameters, on the electron and hole states, in two truncated conical quantum dots: (i) GaAs-(Ga,Al)As in the presence of a shallow donor impurity and under an applied magnetic field and (ii) CdSe–CdTe core–shell type-II quantum dot. For the first system, the impurity position and the applied magnetic field direction were chosen to preserve the system’s azimuthal symmetry. The finite element method obtains the solution of the Schrödinger equations for electron or hole with or without impurity with an adaptive discretization of a triangular mesh. The interaction of the electron and hole states is calculated in a first-order perturbative approximation. This study shows that the magnetic field and donor impurities are relevant factors in the optoelectronic properties of conical quantum dots. Additionally, for the CdSe–CdTe quantum dot, where, again, the axial symmetry is preserved, a switch between direct and indirect exciton is possible to be controlled through geometry.COL003331919application/pdfengMDPIBasilea, Suizahttp://creativecommons.org/licenses/by/2.5/co/https://creativecommons.org/licenses/by/4.0/Atribución 2.5 Colombiainfo:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Shallow Donor Impurity States with Excitonic Contribution in GaAs/AlGaAs and CdTe/CdSe Truncated Conical Quantum Dots under Applied Magnetic FieldArtículo 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/publishedVersionTruncated conical quantum dotsPuntos cuánticos cónicos truncadosExciton statesEstados de excitónDonor-impurity statesApplied magnetic fieldType II quantum dotsNanomaterials1911111NanomaterialsPublicationORIGINALGilJohn_2021_ShallowDonorImpurityStates.pdfGilJohn_2021_ShallowDonorImpurityStates.pdfArtículo de investigaciónapplication/pdf967348https://bibliotecadigital.udea.edu.co/bitstreams/54f81e64-1f19-4bfa-82d5-8eae2d99760a/download1cc301a6ef57e8650ebda00f4313a34fMD51trueAnonymousREADCC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8927https://bibliotecadigital.udea.edu.co/bitstreams/ec3412b0-10ac-49f1-90e4-9028294250cc/download1646d1f6b96dbbbc38035efc9239ac9cMD52falseAnonymousREADLICENSElicense.txtlicense.txttext/plain; charset=utf-81748https://bibliotecadigital.udea.edu.co/bitstreams/3ec39358-dabb-4ae7-aa5c-f89e980d7cfc/download8a4605be74aa9ea9d79846c1fba20a33MD53falseAnonymousREADTEXTGilJohn_2021_ShallowDonorImpurityStates.pdf.txtGilJohn_2021_ShallowDonorImpurityStates.pdf.txtExtracted texttext/plain72185https://bibliotecadigital.udea.edu.co/bitstreams/06050507-6e24-4e92-9d34-9b29d0164b7c/downloadac7527d2b8ca40d281656647aa0e2348MD54falseAnonymousREADTHUMBNAILGilJohn_2021_ShallowDonorImpurityStates.pdf.jpgGilJohn_2021_ShallowDonorImpurityStates.pdf.jpgGenerated Thumbnailimage/jpeg15995https://bibliotecadigital.udea.edu.co/bitstreams/8079a87d-9b8f-4935-80e5-ca12661da5b7/download5b82a46bf6979d2eb594a3646e6dc7a2MD55falseAnonymousREAD10495/26172oai:bibliotecadigital.udea.edu.co:10495/261722025-03-27 01:40:44.458http://creativecommons.org/licenses/by/2.5/co/open.accesshttps://bibliotecadigital.udea.edu.coRepositorio Institucional de la Universidad de Antioquiaaplicacionbibliotecadigitalbiblioteca@udea.edu.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 |