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Peculiarities of the initial stage of growth of niobium-based nanostructures on a Si(111)-7 × 7 surface

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Abstract

The initial stage of growth of nanoislands prepared by thermal deposition of niobium on the reconstructed surface of Si(111)-7 × 7 in ultrahigh vacuum is experimentally investigated. The morphological and electrophysical properties of niobium-based nanostructures are studied by means of low-temperature scanning tunneling microscopy and spectroscopy. It is found that upon the deposition of niobium on a substrate at room temperature, clusters and nanoislands are formed on the silicon surface, having a characteristic lateral size of 10 nm with the metallic type of tunneling conductivity at low temperatures. Upon the deposition of niobium on a heated substrate, quasi-one-dimensional (1D) and quasi-two-dimensional (2D) structures with typical lateral dimensions of up to 200 nm and three-dimensional pyramidal islands with semiconducting type of tunneling conductivity at low temperatures are formed.

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Authors and Affiliations

  1. Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhny Novgorod, 603950, Russia

    A. V. Putilov & A. Yu. Aladyshkin

  2. Faculty of Physics, Moscow State University, Moscow, 119991, Russia

    D. A. Muzychenko

  3. Lobachevsky State University, Nizhny Novgorod, pr. Gagarina 23, Nizhny Novgorod, 603950, Russia

    A. Yu. Aladyshkin

Authors
  1. A. V. Putilov
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  2. D. A. Muzychenko
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  3. A. Yu. Aladyshkin
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Correspondence to A. Yu. Aladyshkin.

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Original Russian Text © A.V. Putilov, D.A. Muzychenko, A.Yu. Aladyshkin, 2016, published in Poverkhnost’. Rentgenovskie, Sinkhrotronnye i Neitronnye Issledovaniya, 2016, No. 3, pp. 10–18.

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Putilov, A.V., Muzychenko, D.A. & Aladyshkin, A.Y. Peculiarities of the initial stage of growth of niobium-based nanostructures on a Si(111)-7 × 7 surface. J. Surf. Investig. 10, 273–281 (2016). https://doi.org/10.1134/S1027451016020178

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