Kondo Effect in a Quantum Dot Coupled to Ferromagnetic Leads and a Mesoscopic Ring
HUANG Rui1, WU Shao-Quan1, YAN Cong-Hua1, SUN Wei-Li1, YU Wan-Lun2
1College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610068
2Chengdu University of Information Technology, Chengdu 610030
Kondo Effect in a Quantum Dot Coupled to Ferromagnetic Leads and a Mesoscopic Ring
1College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610068
2Chengdu University of Information Technology, Chengdu 610030
Abstract： Using an equation of motion technique, we investigate the Kondo effect in a quantum dot coupled to ferromagnetic leads and a mesoscopic ring. It is shown that the Kondo resonance at the Fermi level of the dot presents the periodic change along with the aggrandizement of the magnetic flux and the number of lattice sites NR in the mesoscopic ring, and for the antiparallel spin alignment the Kondo resonances for spin-up and spin-down configurations appear at the same position. However, for the parallel spin alignment, the Kondo resonance splits for the spin-up and spin-down configurations.
HUANG Rui;WU Shao-Quan;YAN Cong-Hua;SUN Wei-Li;YU Wan-Lun. Kondo Effect in a Quantum Dot Coupled to Ferromagnetic Leads and a Mesoscopic Ring[J]. 中国物理快报, 2006, 23(7): 1892-1896.
HUANG Rui, WU Shao-Quan, YAN Cong-Hua, SUN Wei-Li, YU Wan-Lun. Kondo Effect in a Quantum Dot Coupled to Ferromagnetic Leads and a Mesoscopic Ring. Chin. Phys. Lett., 2006, 23(7): 1892-1896.
2006, Vol. 23 
