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Asymmetric Kondo resonance splitting transition in T-shaped coupled-quantum-dot devices

Chen Xiong-Wen Shi Zhen-Gang Chen Bao-Ju Song Ke-Hui

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Asymmetric Kondo resonance splitting transition in T-shaped coupled-quantum-dot devices

Chen Xiong-Wen, Shi Zhen-Gang, Chen Bao-Ju, Song Ke-Hui
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  • Using the slave-boson mean-field approximation, we theoretically study the transport properties of the ground state of the T-shaped coupled quantum dots with two metallic leads by means of one-impurity Anderson Hamiltonian. It is found that when this system is in the equilibrium state, with the increase of the inter-dot coupling, the Kondo resonance is suppressed, and the single Kondo peak of the density of the Kondo quantum dot is split into two asymmetric Kondo peaks. When it is in the non-equilibrium state, when increasing the bias, this asymmetric Kondo splitting is enhanced.
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  • Abstract views:  8024
  • PDF Downloads:  850
  • Cited By: 0
Publishing process
  • Received Date:  03 July 2007
  • Accepted Date:  04 September 2007
  • Published Online:  05 February 2008

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