Tunable Kondo Effect of a Three-Terminal Transport Quantum Dot Embedded in an Aharonov--Bohm Ring
CHEN Xiong-Wen1,2, SHI Zhen-Gang1,2, WU Shao-Quan3, SONG Ke-Hui1,2
1Department of Physics and Electronic Information Science, Huaihua University, Huaihua 418008
2Research Institute of Information Science, Huaihua University, Huaihua 418008
Tunable Kondo Effect of a Three-Terminal Transport Quantum Dot Embedded in an Aharonov--Bohm Ring
1Department of Physics and Electronic Information Science, Huaihua University, Huaihua 418008
2Research Institute of Information Science, Huaihua University, Huaihua 418008
Abstract： We theoretically investigate the Kondo effect of a three-terminal transport quantum dot (QD) embedded in an Aharonov--Bohm ring in the Kondo regime by means of the one-impurity Anderson Hamiltonian. The Hamiltonian is solved by means of the slave-boson mean-field theory. We find that in this system, the Kondo effect depends sensitively on the parity and size of the ring; the Kondo screening cloud can be tuned by tuning the coupling strength of the reservoir-dot. Thus this model might be a candidate for future device applications.
CHEN Xiong-Wen;SHI Zhen-Gang;WU Shao-Quan;SONG Ke-Hui;. Tunable Kondo Effect of a Three-Terminal Transport Quantum Dot Embedded in an Aharonov--Bohm Ring[J]. 中国物理快报, 2006, 23(2): 439-442.
CHEN Xiong-Wen, SHI Zhen-Gang, WU Shao-Quan, SONG Ke-Hui,. Tunable Kondo Effect of a Three-Terminal Transport Quantum Dot Embedded in an Aharonov--Bohm Ring. Chin. Phys. Lett., 2006, 23(2): 439-442.
2006, Vol. 23 
