摘要
基于Bardeen-Cooper-Schrieffer(BCS)理论,在紧束缚近似下,利用Bogoliubov-de Gennes(BdG)方程,通过自洽计算,研究了具有S波配对的超导石墨烯-石墨烯结中的近邻效应。针对在超导部分和正常导体部分的费米能级匹配和不匹配的两种情况,讨论了化学势对体系的局域态密度,以及配对振幅的影响。
On the basis of Bardeen-Cooper-Schrieffer(BCS) theory and self-consistent calculation of the Bogoliubov-de-Gennes equations,this paper investigated proximity effect on a superconducting graphene with s-wave pairing and graphene junction structure.The dependence of the local density of states and pairing amplitude on the chemical potential was calculated for both the Fermi-level match case and Fermi-level mismatch case.The relation between the results and electronic structure was also discussed.
出处
《河南科技大学学报（自然科学版）》
CAS
北大核心
2011年第4期65-70,111-112,共6页
Journal of Henan University of Science And Technology:Natural Science
基金
国家自然科学基金项目(10874154)
国家人力资源和社会保障部留学回国人员科技活动择优基金项目
关键词
石墨烯
超导
S波配对
BCS理论
近邻效应
Graphene
Superconductivity
S-wave pairing
BCS theory
Proximity effect
