Macroscopic quantum coherence in a single molecular magnet and Kondo effect of electron transport

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• 作者：Bo Chang ; ^a ; ^{jqliang@sxu.edu.cn"" rel=""nofollow} ; Qiang Wang^a ; Haiqing Xie^a ; J.-Q. Liang^a
• 关键词：Quantum dot ; Molecule magnet ; Macroscopic quantum phenomena ; Kondo effect
• 刊名：Physics Letters A
• 出版年：2011
• 出版时间：25 July 2011
• 年：2011
• 卷：375
• 期：32
• 页码：2932-2938
• 全文大小：351 K

文摘

We report a Kondo-effect study of electron transport through a quantum dot with embedded biaxial single-molecule magnet based on slave boson mean-field theory and non-equilibrium Green-function technique. It is found the macroscopic quantum coherence of molecule-magnet results in the Kondo peak split of differential conductance due to interaction between electron and molecular magnet. It is also demonstrated that both the peak height and position can be controlled by the sweeping magnetic field and polarization of ferromagnetic electrodes. The characteristic peak split may be used to identify the macroscopic quantum coherence and develop molecule devices.