Quasi-two-dimensional conductivity and magnetoconductivity of graphite-like nanosize crystallitesстатья

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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.

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[1] Quasi-two-dimensional conductivity and magnetoconductivity of graphite-like nanosize crystallites / A. I. Romanenko, O. B. Anikeeva, V. L. Kuznetsov et al. // Solid State Communications. — 2006. — Vol. 137, no. 11. — P. 625–629. The temperature dependence of electrical conductivity and magnetoconductivity of new type of carbon films composed of nanosize thin graphite-like crystallites were investigated at temperature interval of 4.2-300 K and in the magnetic field range of 0-12 kG at 4.2 K, respectively. The crystallites consist of several (5-50) graphene layers which have predominant orientation perpendicularly to a film surface. At temperature <= 30 K the logarithmic conductivity decreases linearly with temperature. The positive magnetoconductivity of the films was observed in a magnetic field directed perpendicularly to the film surface in all intervals of field values. In magnetic field B >= 4 kG the logarithmic asymptotic of conductivity from magnetic field was observed. That is characteristic of the systems with two-dimensional quantum corrections to magnetoconductivity. In a magnetic field directed along a film surface, the crossover from negative to positive magnetoresistivity is observed at B >= 8 kG. (c) 2006 Elsevier Ltd. All rights reserved. [ DOI ]

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