文章基本信息

标题：Electron spin coherence near room temperature in magnetic quantum dots
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作者：Fabrizio Moro ; Lyudmila Turyanska ; James Wilman 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
DOI：10.1038/srep10855
出版社：Springer Nature
摘要：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 ( T _M ~ 8 μs) and spin–lattice relaxation ( T ₁ ~ 10 ms) time constants for Mn²⁺ ions at T = 4.5 K, and in electron spin coherence observable near room temperature ( T _M ~ 1 μs).