Ultrafast spin dynamics in II-VI diluted magnetic semiconductors with spin-orbit interaction

We study theoretically the ultrafast spin dynamics of II-VI diluted magnetic semiconductors in the presence of spin-orbit interaction. Our goal is to explore the interplay or competition between the exchange sd coupling and the spin-orbit interaction in both bulk and quantum-well systems. For bulk m...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autor principal: Tamborenea, Pablo Ignacio
Publicado: 2015
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v91_n19_p_Ungar
http://hdl.handle.net/20.500.12110/paper_10980121_v91_n19_p_Ungar
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_10980121_v91_n19_p_Ungar
record_format dspace
spelling paper:paper_10980121_v91_n19_p_Ungar2023-06-08T16:07:57Z Ultrafast spin dynamics in II-VI diluted magnetic semiconductors with spin-orbit interaction Tamborenea, Pablo Ignacio We study theoretically the ultrafast spin dynamics of II-VI diluted magnetic semiconductors in the presence of spin-orbit interaction. Our goal is to explore the interplay or competition between the exchange sd coupling and the spin-orbit interaction in both bulk and quantum-well systems. For bulk materials we concentrate on Zn1-xMnxSe and take into account the Dresselhaus interaction, while for quantum wells we examine Hg1-x-yMnxCdyTe systems with a strong Rashba coupling. Our calculations were performed with a recently developed formalism which incorporates electronic correlations beyond mean-field theory originating from the exchange sd coupling. For both bulk and quasi-two-dimensional systems we find that, by varying the system parameters within realistic ranges, either of the two interactions can be chosen to play a dominant role or they can compete on an equal footing with each other. The most notable effect of the spin-orbit interaction in both types of system is the appearance of strong oscillations where the exchange sd coupling by itself causes only an exponential decay of the mean electronic spin components. The mean-field approximation is also studied and an analytical interpretation is given as to why it shows a strong suppression of the spin-orbit-induced dephasing of the spin component parallel to the Mn magnetic field. © 2015 American Physical Society. Fil:Tamborenea, P.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v91_n19_p_Ungar http://hdl.handle.net/20.500.12110/paper_10980121_v91_n19_p_Ungar
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description We study theoretically the ultrafast spin dynamics of II-VI diluted magnetic semiconductors in the presence of spin-orbit interaction. Our goal is to explore the interplay or competition between the exchange sd coupling and the spin-orbit interaction in both bulk and quantum-well systems. For bulk materials we concentrate on Zn1-xMnxSe and take into account the Dresselhaus interaction, while for quantum wells we examine Hg1-x-yMnxCdyTe systems with a strong Rashba coupling. Our calculations were performed with a recently developed formalism which incorporates electronic correlations beyond mean-field theory originating from the exchange sd coupling. For both bulk and quasi-two-dimensional systems we find that, by varying the system parameters within realistic ranges, either of the two interactions can be chosen to play a dominant role or they can compete on an equal footing with each other. The most notable effect of the spin-orbit interaction in both types of system is the appearance of strong oscillations where the exchange sd coupling by itself causes only an exponential decay of the mean electronic spin components. The mean-field approximation is also studied and an analytical interpretation is given as to why it shows a strong suppression of the spin-orbit-induced dephasing of the spin component parallel to the Mn magnetic field. © 2015 American Physical Society.
author Tamborenea, Pablo Ignacio
spellingShingle Tamborenea, Pablo Ignacio
Ultrafast spin dynamics in II-VI diluted magnetic semiconductors with spin-orbit interaction
author_facet Tamborenea, Pablo Ignacio
author_sort Tamborenea, Pablo Ignacio
title Ultrafast spin dynamics in II-VI diluted magnetic semiconductors with spin-orbit interaction
title_short Ultrafast spin dynamics in II-VI diluted magnetic semiconductors with spin-orbit interaction
title_full Ultrafast spin dynamics in II-VI diluted magnetic semiconductors with spin-orbit interaction
title_fullStr Ultrafast spin dynamics in II-VI diluted magnetic semiconductors with spin-orbit interaction
title_full_unstemmed Ultrafast spin dynamics in II-VI diluted magnetic semiconductors with spin-orbit interaction
title_sort ultrafast spin dynamics in ii-vi diluted magnetic semiconductors with spin-orbit interaction
publishDate 2015
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v91_n19_p_Ungar
http://hdl.handle.net/20.500.12110/paper_10980121_v91_n19_p_Ungar
work_keys_str_mv AT tamboreneapabloignacio ultrafastspindynamicsiniividilutedmagneticsemiconductorswithspinorbitinteraction
_version_ 1768542094637400064

Ejemplares similares