Model of an exotic chiral superconducting phase in a graphene bilayer

Abstract

We theoretically demonstrate the formation of a new type of unconventional superconductivity in graphene materials, which exhibits gapless property. The studied superconductivity is based on an interlayer pairing of chiral electrons in bilayer graphene, which results in an exotic s-wave spin-triplet condensate order with anomalous thermodynamic properties. These include the possibility of a temperature induced condensation causing an increase of the pairing gap with increasing temperature, and an entropy of the stable superconducting state which can be higher than its value in the normal state. Our study reveals the analogy of the interlayer superconductivity in graphene materials to the color superconductivity in dense quark matter and the gapless pairing states in nuclear matter and ultra-cold atomic gases.

4.2 pages, 3 figures, accepted for publication in Phys. Rev. Lett

References in corpus (10)

• The electronic properties of graphene
• Universal Dynamic Conductivity and Quantized Visible Opacity of Suspended Graphene
• Chiral tunneling and the Klein paradox in graphene
• Color superconductivity in dense quark matter
• Andreev reflection and Klein tunneling in graphene
• Bipolar supercurrent in graphene
• Quantum interference and Klein tunneling in graphene heterojunctions
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• Determination of Gap Solution and Critical Temperature in Doped Graphene Superconductivity
• Superconducting Symmetry Phases and Dominant bands in (Ca-) Intercalated AA- Bilayer Graphene