Title

Suppression Of The Superconducting Transition Temperature Of Doped Graphene Due To Thermal Fluctuations Of The Order Parameter

Abstract

In this Brief Report, we analyze the superconducting properties of doped single- and double-layer graphene systems by taking into account the fluctuations of the superconducting order parameter. Our analysis is rather general, and corresponds to a phenomenological electron-electron (hole-hole) attraction defined by its strength and range, and is independent of the origin of attraction. We show that in this model, similar to the case of two-dimensional doped metal, the thermal fluctuations of the order-parameter result in a significant reduction in the Berezinskii-Kosterlitz-Thouless critical temperature Tc comparing to the mean-field temperature Tc MF, and there is a pseudogap phase with a suppressed density of states at temperature range Tc

Publication Date

6-8-2009

Publication Title

Physical Review B - Condensed Matter and Materials Physics

Volume

79

Issue

23

Number of Pages

-

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1103/PhysRevB.79.233402

Socpus ID

67650071131 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/67650071131

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