嵌入耦合量子点的介观Aharonov-Bohm环内的持续电流  

The persistent current in a mesoscopic Aharonov-Bohm ring with a series-coupled double quantum dot

作　　者：吴绍全[1] 谌雄文[1] 孙威立[1] 王顺金[2] 

机构地区：[1]四川师范大学物理系,成都610068 [2]西南交通大学现代物理研究所,成都610031

出　　处：《物理学报》2004年第7期2336-2341,共6页Acta Physica Sinica

摘　　要：使用双杂质的Anderson模型的哈密顿量 ,从理论上研究了一个嵌入耦合量子点的介观Aharonov Bohm环系统处在Kondo区时的基态性质 ,并用slave boson平均场方法求解了哈密顿量 .结果表明 ,在这个系统中 ,宇称效应和复杂的电流 相位关系的出现反映了两个量子点可以相干耦合 .We study theoretically the properties of the ground state of a mescopic ring with a series-coupled double quantum dot in the Kondo regime by means of the two-inpurity Anderson Hamiltonian. The Hamiltonian is solved by means of the slave-boson mean-field theory. It is shown that two dots can be coupled coherently, which is reflected in the appearance of parity effects and the complex current-phase relation in this system. This system might be a possile candidate for future device applications.

关 键 词：持续电流 耦合量子点 宇称效应 KONDO效应 哈密顿量 纳米技术 

分 类 号：O488[理学—固体物理]