Solid phase epitaxy of ferromagnetic MnAs dots on GaMnAs layers
Sadowski, J. · Adell, M. · Kanski, J. · Ilver, L. · Janik, E. · Lusakowska, E. · Domagala, J. Z. · Brucas, R. · Hanson, M.
الأصل · EN
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.
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