Mn doped InSb studied at the atomic scale by cross-sectional scanning tunneling microscopy

Samuel Mauger, Juanita Bocquel, Paul Koenraad, C.E. Feeser, N.D. Parashar, B.W. Wessels

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We present an atomically resolved study of metal-organic vapor epitaxy grown Mn doped InSb. Both topographic and spectroscopic measurements have been performed by cross-sectional scanning tunneling microscopy (STM). The measurements on the Mn doped InSb samples show a perfect crystal structure without any precipitates and reveal that Mn acts as a shallow acceptor. The
Mn concentration of the order of 1020cm3 obtained from the cross-sectional STM data compare well with the intended doping concentration. While the pair correlation function of the Mn atoms showed that their local distribution is uncorrelated beyond the STM resolution for observing individual dopants, disorder in the Mn ion location giving rise to percolation pathways is clearly noted. The amount of clustering that we see is thus as expected for a fully randomly disordered distribution of the Mn atoms and no enhanced clustering or second phase material was observed.
Original languageEnglish
Article number222102
Pages (from-to)1-5
JournalApplied Physics Letters
Issue number22
Publication statusPublished - 30 Nov 2015


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