Fano Interference versus Kondo Effect in Strongly Correlated T-Shaped Quantum Dots Embedded in an Aharonov-Bohm Ring

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2007,（4）
• 页码范围: 1046-1049
• 页数: 4页
• 语种: 英文

摘要

We theoretically investigate the properties of the ground state of the strongly correlated T-shaped double quantum dots embedded in an Aharonov-Bohm ring in the Kondo regime by means of the one-impurity Anderson Hamiltonian.It is found that in this system,the persistent current depends sensitively on the parity and size of the ring.With the increase of interdot coupling,the persistent current is suppressed due to the enhancing Fano interference weakening the Kondo effect.Moreover,when the spin of quantum dot embedded in the aharonovBohm ring is screened,the persistent current peak is not affected by interdot coupling.Thus this model may be a new candidate for detecting Kondo screening cloud.