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Intercalation and Superconductivity in Molecular Crystals

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Abstract

Intercalating polyatomic molecules into a superconductor can noticeably affect the properties of the compound. We propose a mechanism leading to a large increase in T c for such systems. The enhancement of T c is related to the additional pairing interaction arising from the interaction of electrons with the vibrational manifold of the molecules. One immediate prediction of the model is the possibility to observe a site-selective isotope effect. The proposed mechanism explains the recent observation of high-T c superconductivity in hole-doped intercalated fullerides. The value of T c for the C 60 ⋅ 2 CHBr3 compound is calculated withouth any adjustable parameter. The theory also suggests that intercalating CHI3 would further increase the critical temperature to T c ≃ 140 K.

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Authors and Affiliations

  1. Condensed Matter Theory, Paul Scherrer Institute, 5232, Villigen PSI, Switzerland

    Andreas Bill

  2. Lawrence Berkeley Laboratory, University of California, California, 94720

    Vladimir Z. Kresin

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  1. Andreas Bill
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  2. Vladimir Z. Kresin
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Bill, A., Kresin, V.Z. Intercalation and Superconductivity in Molecular Crystals. Journal of Superconductivity 15, 489–494 (2002). https://doi.org/10.1023/A:1021075709538

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