Andreev conductance in the d+id-wave superconducting states of graphene

Yongjin Jiang, Dao-Xin Yao, Erica W. Carlson, Han-Dong Chen, and JiangPing Hu
Phys. Rev. B 77, 235420 – Published 13 June 2008

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 dx2y2+idxy spin singlet pairing state in graphene which can be generated by electronic correlation. We find that effectively the d+id-wave state is a state with mixed s-wave and exotic p+ip-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.

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  • Received 21 February 2008

DOI:https://doi.org/10.1103/PhysRevB.77.235420

©2008 American Physical Society

Authors & Affiliations

Yongjin Jiang1,2, Dao-Xin Yao2, Erica W. Carlson2, Han-Dong Chen3, and JiangPing Hu2

  • 1Department of Physics, ZheJiang Normal University, Jinhua, Zhejiang 321004, People’s Republic of China
  • 2Department of Physics, Purdue University, West Lafayette, Indiana 47907, USA
  • 3Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA

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Issue

Vol. 77, Iss. 23 — 15 June 2008

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