拓扑指数与掺杂二硼化镁体系超导电性的关系  

THE STUDY ON THE RELATIONSHIP BETWEEN THE SUPERCONDUCTIVITY OF DOPIJNG MgB_2 SYSTEM AND TOPOLOGICAL INDEX

作　　者：张涛[1] 孙爱民[1] 朱海滨[1] 王顺青[1] 黄国海[1] 李彦炜[1] 陈团结[1] 

机构地区：[1]西北师范大学物理与电子工程学院,兰州730070

出　　处：《低温物理学报》2007年第4期307-311,共5页Low Temperature Physical Letters

摘　　要：构建了电性连接性指数mF和价电子能级连接性指数mE,计算了二硼化镁体及掺杂二硼化镁体系的0阶拓扑指数0F和0E,发现与超导转变温度Tc之间有良好的规律性,因此,本文提出以电性连接性指数mF和价电子能级连接性指数mE作为掺杂二硼化镁体系超导电性的新判据.The electric connectivity index ^mF and the valence energy level connectivity index ^mE are built up. Calculate the zero topological index ^0F and ^0E of MgB2 and doping MgB2 superconductors, the results show that there exists a good regularity between the superconductive critical transition temperature Tc. therefore, it is suggested that the electric connectivity index ^mF and the valence energy level connectivity index mE can be used as a new criterion for the superconductivity experiment of doping MgB2.

关 键 词：拓扑指数 掺杂二硼化镁 超导电性 

分 类 号：O511[理学—低温物理]