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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