Electron spin coherence near room temperature in magnetic quantum dots

Moro, Fabrizio; Turyanska, Lyudmila; Wilman, James; Fielding, Alistair J.; Fay, Michael W.; Granwehr, Josef; Patan�, Amalia

Abstract

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 ∼8μs) and spin-lattice relaxation (T 1 ∼10ms) time constants for Mn 2+ ions at T=4.5K, and in electron spin coherence observable near room temperature (T M ∼1μs).

Citation

Moro, F., Turyanska, L., Wilman, J., Fielding, A. J., Fay, M. W., Granwehr, J., & Patanè, A. (2015). Electron spin coherence near room temperature in magnetic quantum dots. Scientific Reports, 5, Article 10855. https://doi.org/10.1038/srep10855

• Journal Article Type: Article
• Acceptance Date: May 7, 2015
• Online Publication Date: Jun 4, 2015
• Publication Date: Jun 4, 2015
• Deposit Date: Feb 21, 2020
• Publicly Available Date: Mar 26, 2020
• Journal: Scientific Reports
• Electronic ISSN: 2045-2322
• Publisher: Nature Publishing Group
• Peer Reviewed: Peer Reviewed
• Volume: 5
• Article Number: 10855
• DOI: https://doi.org/10.1038/srep10855
• Public URL: https://nottingham-repository.worktribe.com/output/3159451
• Publisher URL: https://www.nature.com/articles/srep10855
• Additional Information: Received: 25 February 2015; Accepted: 7 May 2015; First Online: 4 June 2015; : The authors declare no competing financial interests.