Transient dynamics of a quantum-dot: From Kondo regime to mixed valence and to empty orbital regimes
ORAL
Abstract
Based on the hierarchical equations of motion approach, we study the time-dependent transport properties of a strongly correlated quantum dot system in the Kondo regime (KR), mixed valence regime (MVR), and empty orbital regime (EOR). We find that the transient current in KR shows the strongest nonlinear response and the most distinct oscillation behaviors. Both behaviors become
weaker in MVR and diminish in EOR. To understand the physical insight, we examine also the corresponding dot occupancies and the spectral functions, with their dependence on the Coulomb interaction, temperature, and applied step bias voltage. The above nonlinear and oscillation behaviors could be understood as the interplay between dynamicalKondo resonance and single electron resonanttunneling.
weaker in MVR and diminish in EOR. To understand the physical insight, we examine also the corresponding dot occupancies and the spectral functions, with their dependence on the Coulomb interaction, temperature, and applied step bias voltage. The above nonlinear and oscillation behaviors could be understood as the interplay between dynamicalKondo resonance and single electron resonanttunneling.
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Presenters
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Yongxi Cheng
Simulation of Physical Systems, Beijing Computational Science Research Center
Authors
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Yongxi Cheng
Simulation of Physical Systems, Beijing Computational Science Research Center
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Zhen-Hua Li
Simulation of Physical Systems, Beijing Computational Science Research Center
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Jian-Hua Wei
Department of Physics, renmin university of China
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Yi-Hang Nie
Institute of Theoretical Physics, Shanxi university
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Yijing Yan
Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China