Abstract
We show that effective superconducting orders generally emerge at low energy in the superconducting state of graphene with conventionally defined pairing symmetry. We study a particular interesting example, the spin singlet pairing state in graphene which can be generated by electronic correlation. We find that effectively the -wave state is a state with mixed -wave and exotic -wave pairing orders at low energy. This remarkable property leads to distinctive superconducting gap functions and behavior of the Andreev conductance spectra through a normal/superconducting graphene structure.
- Received 21 February 2008
DOI:https://doi.org/10.1103/PhysRevB.77.235420
©2008 American Physical Society