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Quantum phase transitions and superconductivity: Proposal for the phase diagram of alkali-doped fullerides and by universality HTSC including Wigner solids

Authors

  • Richard H. Squire,

    Corresponding author
    1. Department of Chemistry, West Virginia University, Institute of Technology, 1102 Orndorff Hall, Montgomery, West Virginia 25136, USA
    • Department of Chemistry, West Virginia University, Institute of Technology, 1102 Orndorff Hall, Montgomery, West Virginia 25136, USA
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  • Norman H. March

    1. Department of Physics, University of Antwerp, Groenborgerlaan 171, B-2020 Antwerp, Belgium
    2. Oxford University, Oxford, England
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Abstract

The present study has two prime aims. The first is to attempt an explanation of the recent experiment on a high Tc cuprate in which the superconductivity is suppressed by an applied magnetic field of 58 tesla (T). We propose an interpretation in terms of a specific quantum transition, namely a magnetically induced Wigner solid of charge carriers. Second, we explore similarities between superconductivity in alkali-doped fullerides and the high Tc cuprates based on an interpretation of Uemura-type plots. A phase diagram for alkali-doped fullerides is proposed that contains possible universal quantum phase transitions. Evidence is presented that suggests the superconducting phase is located between Wigner solids of charge carriers in fullerides at higher and lower doping at T = 0. Implications are discussed. © 2005 Wiley Periodicals, Inc. Int J Quantum Chem, 2005

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