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First-Principles Prediction of Doped Graphane as a High-Temperature Electron-Phonon Superconductor

Accepted version
Peer-reviewed

Type

Article

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Authors

Savini, G 
Ferrari, AC 
Giustino, F 

Abstract

We predict by first-principles calculations that p-doped graphane is an electron-phonon superconductor with a critical temperature above the boiling point of liquid nitrogen. The unique strength of the chemical bonds between carbon atoms and the large density of electronic states at the Fermi energy arising from the reduced dimensionality give rise to a giant Kohn anomaly in the optical phonon dispersions and push the superconducting critical temperature above 90 K. As evidence of graphane was recently reported, and doping of related materials such as graphene, diamond, and carbon nanostructures is well established, superconducting graphane may be feasible.

Description

Keywords

cond-mat.mtrl-sci, cond-mat.mtrl-sci, cond-mat.supr-con

Journal Title

Physical Review Letters

Conference Name

Journal ISSN

Volume Title

105

Publisher

American Physical Society
Sponsorship
Engineering and Physical Sciences Research Council (EP/K01711X/1)
European Commission (604391)
European Commission Horizon 2020 (H2020) Future and Emerging Technologies (FET) (696656)
EPSRC (via University of Manchester) (R119256)
European Research Council (319277)
G. S. acknowledges funding from JSPS and Grant-in-Aid for Scientific Research and A. C. F. from The Royal Society, the ERC grant NANOPOTS and EPSRC EP/G042357/1.