Title

Possible High-Temperature Superconductivity in Multilayer Graphane: Can the Cuprates be Beaten?

Authors

Authors

V. M. Loktev;V. Turkowski

Comments

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Abbreviated Journal Title

J. Low Temp. Phys.

Keywords

Superconductivity; Hydrogenated graphene; Electron-phonon coupling; FLUXON PHASE-TRANSITIONS; LAYERED SUPERCONDUCTORS; DIRAC ELECTRONS; GRAPHITE; SYSTEMS; PSEUDOGAP; VORTEX; METAL; MODEL; Physics, Applied; Physics, Condensed Matter

Abstract

We analyze a possible superconductivity in the hole-doped system of layered hydrogenized graphene by taking into account thermal fluctuations of the order parameter. In particular, we demonstrate that in the one-layer case the values of the high mean-field (MF) critical temperature T(c)(MF) similar to 80-90 K, predicted recently by Savini et al (Phys. Rev. Lett. 105:037002, 2010), do not alter significantly due to the fluctuations, and the Berezinskii-Kosterlitz-Thouless (BKT) critical temperature of the vortex superconductivity is almost the same as the MF temperature at doping 0.01-0.1. We show that in the case of multilayer system, when the coupling between the layers stabilizes the superconducting phase in the form of fluxon superconductivity, the critical temperature T(c) can increase dramatically to the values similar to 150 K, higher than the corresponding values in cuprates under ambient pressure.

Journal Title

Journal of Low Temperature Physics

Volume

164

Issue/Number

5-6

Publication Date

1-1-2011

Document Type

Article

Language

English

First Page

264

Last Page

271

WOS Identifier

WOS:000293190400004

ISSN

0022-2291

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