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 Mn2+ 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 an...

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Main Authors:	Moro, Fabrizio, Turyanska, Lyudmila, Wilman, James, Fielding, Alistair J., Fay, Michael W., Granwehr, Josef, Patanè, Amalia
Format:	Online
Language:	English
Published:	Nature Publishing Group 2015
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4455149/

id	pubmed-4455149
recordtype	oai_dc
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 Article We report on an example of confined magnetic ions with long spin coherence near room temperature. This was achieved by confining single Mn2+ 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 (TM ~ 8 μs) and spin–lattice relaxation (T1 ~ 10 ms) time constants for Mn2+ ions at T = 4.5 K, and in electron spin coherence observable near room temperature (TM ~ 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/
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Moro, Fabrizio Turyanska, Lyudmila Wilman, James Fielding, Alistair J. Fay, Michael W. Granwehr, Josef Patanè, Amalia
spellingShingle	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
author_facet	Moro, Fabrizio Turyanska, Lyudmila Wilman, James Fielding, Alistair J. Fay, Michael W. Granwehr, Josef Patanè, Amalia
author_sort	Moro, Fabrizio
title	Electron spin coherence near room temperature in magnetic quantum dots
title_short	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_sort	electron spin coherence near room temperature in magnetic quantum dots
description	We report on an example of confined magnetic ions with long spin coherence near room temperature. This was achieved by confining single Mn2+ 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 (TM ~ 8 μs) and spin–lattice relaxation (T1 ~ 10 ms) time constants for Mn2+ ions at T = 4.5 K, and in electron spin coherence observable near room temperature (TM ~ 1 μs).
publisher	Nature Publishing Group
publishDate	2015
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4455149/
_version_	1613231725422313472

Electron spin coherence near room temperature in magnetic quantum dots

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