Electron spin coherence near room temperature in magnetic quantum dots

We report on an example of confined magnetic ions with long spin coherence near room temperature. This was achieved by confining single Mn(2+) spins in colloidal semiconductor quantum dots (QDs) and by dispersing the QDs in a proton-spin free matrix. The controlled suppression of Mn–Mn interactions...

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Autores principales: Moro, Fabrizio, Turyanska, Lyudmila, Wilman, James, Fielding, Alistair J., Fay, Michael W., Granwehr, Josef, Patanè, Amalia
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4455149/
https://www.ncbi.nlm.nih.gov/pubmed/26040432
http://dx.doi.org/10.1038/srep10855
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author Moro, Fabrizio
Turyanska, Lyudmila
Wilman, James
Fielding, Alistair J.
Fay, Michael W.
Granwehr, Josef
Patanè, Amalia
author_facet Moro, Fabrizio
Turyanska, Lyudmila
Wilman, James
Fielding, Alistair J.
Fay, Michael W.
Granwehr, Josef
Patanè, Amalia
author_sort Moro, Fabrizio
collection PubMed
description We report on an example of confined magnetic ions with long spin coherence near room temperature. This was achieved by confining single Mn(2+) spins in colloidal semiconductor quantum dots (QDs) and by dispersing the QDs in a proton-spin free matrix. The controlled suppression of Mn–Mn interactions and minimization of Mn–nuclear spin dipolar interactions result in unprecedentedly long phase memory (T(M) ~ 8 μs) and spin–lattice relaxation (T(1) ~ 10 ms) time constants for Mn(2+) ions at T = 4.5 K, and in electron spin coherence observable near room temperature (T(M) ~ 1 μs).
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spelling pubmed-44551492015-06-10 Electron spin coherence near room temperature in magnetic quantum dots Moro, Fabrizio Turyanska, Lyudmila Wilman, James Fielding, Alistair J. Fay, Michael W. Granwehr, Josef Patanè, Amalia Sci Rep Article We report on an example of confined magnetic ions with long spin coherence near room temperature. This was achieved by confining single Mn(2+) spins in colloidal semiconductor quantum dots (QDs) and by dispersing the QDs in a proton-spin free matrix. The controlled suppression of Mn–Mn interactions and minimization of Mn–nuclear spin dipolar interactions result in unprecedentedly long phase memory (T(M) ~ 8 μs) and spin–lattice relaxation (T(1) ~ 10 ms) time constants for Mn(2+) ions at T = 4.5 K, and in electron spin coherence observable near room temperature (T(M) ~ 1 μs). Nature Publishing Group 2015-06-04 /pmc/articles/PMC4455149/ /pubmed/26040432 http://dx.doi.org/10.1038/srep10855 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Moro, Fabrizio
Turyanska, Lyudmila
Wilman, James
Fielding, Alistair J.
Fay, Michael W.
Granwehr, Josef
Patanè, Amalia
Electron spin coherence near room temperature in magnetic quantum dots
title Electron spin coherence near room temperature in magnetic quantum dots
title_full Electron spin coherence near room temperature in magnetic quantum dots
title_fullStr Electron spin coherence near room temperature in magnetic quantum dots
title_full_unstemmed Electron spin coherence near room temperature in magnetic quantum dots
title_short Electron spin coherence near room temperature in magnetic quantum dots
title_sort electron spin coherence near room temperature in magnetic quantum dots
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4455149/
https://www.ncbi.nlm.nih.gov/pubmed/26040432
http://dx.doi.org/10.1038/srep10855
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