摘要
对处于磁场中的近藤体系的闭合点环系统,其基态性质用单一杂质安德森模型哈密顿量加以研究;该哈密顿量是用平均场理论Slave Boson技术求解.结果表明:由磁场感应的电流与系统宇称和环的尺寸大小有很大关系.通过理论研究得出一些新的结论并探讨了一些相关问题.
The properties of the ground state of a closed dot-ring system with a magnetic flux in the Kondo regime are studied theoretically by means of a one-impurity Anderson Hamiltonian which is solved by means of the Slave-Boson mean-field theory.It is shown that the persistent current in this system induced by a magnetic flux depends sensitively on both the parity of this system and the size of the ring.Some new results are obtained and relevant underlying physics of this problem is discussed.
出处
《四川师范大学学报（自然科学版）》
CAS
CSCD
2004年第2期176-179,共4页
Journal of Sichuan Normal University（Natural Science）
基金
四川省基础研究基金资助项目
四川省教育厅重点科研基金资助项目
关键词
近藤效应
尺寸依赖
持续电流
近藤屏蔽云
Kondo effect
Size dependence
Persistent currents
Kondo screening cloud
