Current and Shot Noise in a Quantum Dot Coupled to Ferromagnetic Leads in the Kondo Regime
LÜ Rong1,2 , LIU Zhi-Rong3
1 Center for Advanced Study, Tsinghua University, Beijing 100084
2 Ludwig-Maximilians-Universität, Theresienstr. 37, 80333 München, Germany
3 Max Planck Institute for Metals Research, Heisenbergstrasse 3, D-70569 Stuttgart, Germany
Current and Shot Noise in a Quantum Dot Coupled to Ferromagnetic Leads in the Kondo Regime
LÜ Rong1,2 ;LIU Zhi-Rong3
1 Center for Advanced Study, Tsinghua University, Beijing 100084
2 Ludwig-Maximilians-Universität, Theresienstr. 37, 80333 München, Germany
3 Max Planck Institute for Metals Research, Heisenbergstrasse 3, D-70569 Stuttgart, Germany
关键词 ：
73.23.Hk ,
72.70.+m ,
73.63.Kv ,
72.25.-b
Abstract ： Using the Keldysh nonequilibrium Green function technique, we study the current and shot noise spectroscopy of an interacting quantum dot coupled to two ferromagnetic leads with different polarizations in the Kondo regime. General formulas of current and shot noise are obtained, which can be applied in both the parallel (P) and antiparallel (AP) alignment cases. For large polarization values, it is revealed that the behaviour of differential conductance and shot noise are completely different for spin up and spin down configurations in the P alignment case. However, the differential conductance and shot noise have similar properties for different spin configurations in the P alignment case with the small polarization value and in the AP alignment case with any polarization value.
Key words ：
73.23.Hk
72.70.+m
73.63.Kv
72.25.-b
出版日期: 2007-01-01
引用本文:
LÜRong;LIU Zhi-Rong. Current and Shot Noise in a Quantum Dot Coupled to Ferromagnetic Leads in the Kondo Regime[J]. 中国物理快报, 2007, 24(1): 195-198.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2007/V24/I1/195
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