Papers by Author: Boris A. Andreev

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Authors: Valentin V. Emtsev, Boris A. Andreev, Gagik A. Oganesyan, D.I. Kryzhkov, Andrzej Misiuk, Charalamos A. Londos, M.S. Potsidi
Abstract: Effects of compressive stress on oxygen agglomeration processes in Czochralski grown silicon heat treated at T= 450OC, used as a reference temperature, and T= 600OC to 800OC are investigated in some detail. Compressive stresses of about P= 1 GPa lead to enhanced formation of Thermal Double Donors in materials annealed over a temperature range of T= 450OC – 600OC. It has been shown that the formation of thermal donors at T= 450OC under normal conditions and compressive stress is accompanied with loss of substitutional boron. In contrast, the concentration of the shallow acceptor states of substitutional boron in silicon annealed under stress at T≥ 600OC remains constant. An enhancement effect of thermal donor formation is gradually weakened at T≥ 700OC. The oxygen diffusivity sensitive to mechanical stress is believed to be responsible for the observed effects in heat-treated silicon.
Authors: Boris A. Andreev, V.B. Ikonnikov, E.B. Koslov, T.M. Lifshits, V.B. Shmagin
Authors: V.B. Shmagin, Boris A. Andreev, V.A. Gavva, A.V. Gusev, T.V. Kotereva, V.G. Pimenov
Authors: Valentin V. Emtsev, Boris A. Andreev, D.S. Poloskin, N.A. Sobolev, Elena I. Shek
Authors: Valentin V. Emtsev, Gagik A. Oganesyan, Nikolay V. Abrosimov, Boris A. Andreev
Abstract: Si1-xGex alloys with small atomic fraction of Ge, x≤ 0.05 are investigated. The Hall mobility of electrons in n-type materials was measured at cryogenic temperatures, T≤ 100 K. Taking into account the partial mobility due to charge carrier scattering by ionized centers and phonons it is possible to estimate the partial mobility associated with alloy scattering. It appears that this contribution to the electron mobility in n-Si1-xGex at low temperatures is important even at x≈0.01. The obtained results can be useful for understanding the nature of SiGe alloys and their transport properties.
Authors: Andrzej Misiuk, Boris A. Andreev, Valentin V. Emtsev, Charalamos A. Londos, Gagik A. Oganesyan, D.S. Poloskin
Authors: Boris A. Andreev, E.B. Kozlov, T.M. Lifshits
Authors: S.B. Aldabergenova, Boris A. Andreev, K.V. Koughia, T.A. Sidorova
Authors: C.A.J. Ammerlaan, D.T.X. Thao, T. Gregorkiewicz, Boris A. Andreev, Z.F. Krasil'nik
Authors: Valentin V. Emtsev, N.A. Sobolev, Boris A. Andreev, D.S. Poloskin, Elena I. Shek
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