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19 April 2024

» arxiv » cond-mat/0504074

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Solid phase epitaxy of ferromagnetic MnAs dots on GaMnAs layers
J. Sadowski ; M. Adell ; J. Kanski ; L. Ilver ; E. Janik ; E. Lusakowska ; J. Z. Domagala ; R. Brucas ; M. Hanson ;
Date:	4 Apr 2005
Subject:	Materials Science \| cond-mat.mtrl-sci
Abstract:	Formation of MnAs quantum dots in a regular ring-like distribution has been found on MBE-grown (GaMn)As surfaces after low-temperature annealing under As capping. The Mn was supplied by out-diffusing Mn interstitials from (GaMn)As. With 5 at% substitutional Mn the quantum dots appeared for (GaMn)As layers thicker than 500 A. For thinner layers the Mn-rich surfaces, presumably monolayer thick MnAs, are smooth and well-ordered (1x2), and are well suited for continued epitaxial growth.
Source:	arXiv, cond-mat/0504074
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