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On the superconductivity of graphite interfaces

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arxiv 1407.2060 v3 pith:QYG47CXY submitted 2014-07-08 cond-mat.supr-con cond-mat.mes-hall

On the superconductivity of graphite interfaces

Pablo Esquinazi , Tero T. Heikkil\"a , Yury V. Lysogorskiy , Dmitrii A. Tayurskii , Grigory E. Volovik This is my paper
classification cond-mat.supr-con cond-mat.mes-hall
keywords graphitesuperconductivityinterfacesexplanationflatnetworksamplestemperature
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We propose an explanation for the appearance of superconductivity at the interfaces of graphite with Bernal stacking order. A network of line defects with flat bands appears at the interfaces between two slightly twisted graphite structures. Due to the flat band the probability to find high temperature superconductivity at these quasi one-dimensional corridors is strongly enhanced. When the network of superconducting lines is dense it becomes effectively two-dimensional. The model provides an explanation for several reports on the observation of superconductivity up to room temperature in different oriented graphite samples, graphite powders as well as graphite-composite samples published in the past.

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