Unconventional chiral d-wave superconducting state in strained graphene

• 来源期刊: 中国物理B（英文版）
• 关键词: chiral d-wave superconducting state pair density wave flat band doped graphene
• 年，卷（期）: 2019,（11）
• 页码范围: 371-378
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-1056/ab478c

摘要

We consider a highly unconventional superconducting state with chiral d-wave symmetry in doped graphene under strain with the Gutzwiller-RVB method in the momentum space.It is shown that flat bands emerge in the normal state for reasonable strain.As a result,the superconducting critical temperature is found to be linearly proportional to the strength of the electron-electron interaction.Furthermore,the chiral d-wave superconducting state is shown with coexistence of the charge density wave and the pair density wave.There are different coexisting states with those orders under different doping levels.