Impact of electron-phonon coupling on electron transport through T-shaped arrangements of quantum dots in the Kondo regime

Patryk Florków; Stanisław Lipiński

doi:10.3762/bjnano.12.89

Impact of electron-phonon coupling on electron transport through T-shaped arrangements of quantum dots in the Kondo regime

Beilstein J Nanotechnol. 2021 Nov 12:12:1209-1225. doi: 10.3762/bjnano.12.89. eCollection 2021.

Authors

Patryk Florków¹, Stanisław Lipiński¹

Affiliation

¹ Department of Theory of Nanostructures, Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland.

Abstract

We calculate the conductance through strongly correlated T-shaped molecular or quantum dot systems under the influence of phonons. The system is modelled by the extended Anderson-Holstein Hamiltonian. The finite-U mean-field slave boson approach is used to study many-body effects. Phonons influence both interference and correlations. Depending on the dot unperturbed energy and the strength of electron-phonon interaction, the system is occupied by a different number of electrons that effectively interact with each other repulsively or attractively. This leads, together with the interference effects, to different spin or charge Fano-Kondo effects.

Keywords: Fano effect; Kondo effect; polarons; quantum dots.