Search for the Reasons of Josephson Like Behavior of Thin Granular Carbon Films

Details Search for the Reasons of Josephson Like Behavior of Thin Granular Carbon Films Search for the Reasons of Josephson Like Behavior of Thin Granular Carbon Films

2008-02-28

arxiv.org/abs/0802.4197v1

Physics

Condensed Matter

Superconductivity

39 pages, 18 figures

Scientific paper

This review is described some new results in the studies of anomalous electromagnetic of thin carbon films. Starting with historical sketch of studies of superconductivity and electromagnetic in carbonaceous materials the efforts of such persons as the Nobel Prize winners Vitaly L.Ginzburg and W.A.Little, the Polish outstanding scientist K.Antonowicz, the Americans J.T.Chen, Liren Zhao and Bor Z. Jang, the German researcher P.Esquinazy and his group, the Russian scientists T.L.Makarova, V.I.Tsebro, O.E.Omelyanovskii and A.P. Moravskii, and the Chinese scientists G.M.Zhao and Y.S.Wang has been mentioned. The work presents the study of some new anomalous electromagnetic effects in graphite-like thin carbon films. These are: The fast switching (10-9 sec) of electrical conductivity The detection of microwave radiation and its temperature dependence The oscillations of film stack magnetization in a magnetic field of 1-5 T The generation of optical radiation during the spasmodic switching of conductivity These effects are explained to be the consequence of carbon films granular structure, which can be considered as the Josephson junction array (JJA). The description of theory of the reversed ac Josephson effect (RJE) and its application to the search of high-temperature superconducting (SC) phase in granular materials was done. As for magnetic properties the description of the technique of P.Barbara and co-workers, A.P.Nielsen e.a., C.Auletta et al., Mahesh Chandran and other scientists on studies of two-dimensional JJA has been added. The both mentioned techniques have been applied to analyze the data on electromagnetic measurements in the thin granular carbon films.

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