石墨烯约瑟夫森电流的推导与计算  

The Deduction and Calculation of Josephson Current in Graphene SNS Josephson Junctions

作　　者：李瑞琴[1] 李东翔[1] 甘松[1] 

机构地区：[1]安顺学院数理学院,贵州安顺561000

出　　处：《安顺学院学报》2015年第1期122-123,128,共3页Journal of Anshun University

摘　　要：结合相对量子力学的狄拉克方程和超导体的Bogoliubov-de Gennes(BdG)方程,文章通过紧束缚近似,得到了石墨烯哈密顿量的BdG方程,通过对这个BdG方程进行自洽求解,研究了石墨烯SNS(superconductor-normal conductor-superconductor)Josephson结中的约瑟夫森电流。Combined with the relative quantum mechanics of the Dirac equation and superconduct of Bogoliubov-de Gennes（BdG）equation we get the Bogoliubov-de Gennes（BdG）equation of the tight-binding Hamiltonian for the graphene lattice system.Based on the self-consistent solution of the BdG equations,we investigate the Josephson current in SNS（superconductor-normal conductor-superconductor）Josephson junction of graphene.

关 键 词：石墨烯 紧束缚近似 约瑟夫森电流 

分 类 号：O472[理学—半导体物理]