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Updated: Aug 30, 2026

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
Published on: June 3, 2015
Spin current through a quantum dot in the presence of an oscillating magnetic field
Ping Zhang1, Qi-Kun Xue, X C Xie
1International Center for Quantum Structures, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China.
Abstract:
Nonequilibrium spin transport through an interacting quantum dot is analyzed. The coherent spin oscillations in the dot provide a generating source for spin current. In the interacting regime, the Kondo effect is influenced in a significant way by the presence of the processing magnetic field. In particular, when the precession frequency is tuned to resonance between spin-up and spin-down states of the dot, Kondo singularity for each spin splits into a superposition of two resonance peaks. The Kondo-type cotunneling contribution is manifested by a large enhancement of the pumped spin current in the strong coupling low temperature regime.
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