2024-03-28T09:21:46Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/447362018-09-13T07:04:42Zcom_10261_2855com_10261_4col_10261_2857
DIGITAL.CSIC
author
Lim, Jong-Soo
author
López, Rosa
author
Platero, Gloria
author
Simon, Pascal
2012-01-25T14:52:47Z
2012-01-25T14:52:47Z
2010
Physical Review B 81: 165107 (2010)
1098-0121
http://hdl.handle.net/10261/44736
10.1103/PhysRevB.81.165107
We theoretically investigate the transport properties of a molecule embedded in one arm of a mesoscopic Aharonov-Bohm interferometer. Due to the presence of phonons the molecule level position (εd) and the electron-electron interaction (U) undergo a polaronic shift, which affects dramatically the electronic transport through the molecular junction. When the electron-phonon interaction is weak the linear conductance presents Fano-line shapes as long as the direct channel between the electrodes is opened. The observed Fano resonances in the linear conductance are originated from the interference between the spin Kondo state and the direct path. For strong enough electron-phonon interaction, the electron-electron interaction is renormalized toward negative values, i.e., becomes effectively attractive. This scenario favors fluctuations between the empty and doubly occupied charge states and therefore promotes a charge Kondo effect. However, the direct path between the contacts breaks the electron-hole symmetry, which can efficiently suppress this charge Kondo effect. Nevertheless, we show that a proper tuning of the gate voltage is bale to revive the Kondo resonance. Our results are obtained by using the Numerical Renormalization approximation to compute the electronic spectral function and the linear conductance.
eng
openAccess
Transport properties of a molecule embedded in an Aharonov-Bohm interferometer
artículo
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URL
https://digital.csic.es/bitstream/10261/44736/1/PhysRevB.81.165107.pdf
File
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application/pdf
PhysRevB.81.165107.pdf
URL
https://digital.csic.es/bitstream/10261/44736/4/PhysRevB.81.165107.pdf.txt
File
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text/plain
PhysRevB.81.165107.pdf.txt