2016/03/07 by P. Roura-Bas, L. Tosi, A. A. Aligia
Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Anomaly (physics) #Atomic physics #Condensed matter physics #Conductance #Electron #Energy (signal processing) #Kondo effect #Molecular Junctions and Nanostructures #Molecular vibration #Molecule #Omega #Order (exchange) #Physics #Quantum and electron transport phenomena #Quantum mechanics #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.93.115139
published as Phys. Rev. B 93, 115139 (2016) · 6 pages, 4 figures. Accepted for publication in Physical Review B
arxiv created 2016/03/07 · openalex publication_date 2016/03/24 · arxiv updated 2016/04/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The low temperature properties of single level molecular quantum dots including both electron-electron and electron-vibration interactions, are theoretically investigated. The calculated differential conductance in the Kondo regime exhibits not only the zero bias anomaly but also side peaks located at bias voltages which coincide with multiples of the energy of vibronic mode V\ensuremath∼\ensuremathℏ\mathrm\ensuremathΩ/e. We obtain that the evolution with temperature of the two main satellite conductance peaks follows the corresponding one of the Kondo peak when \ensuremathℏ\mathrm\ensuremathΩ\ensuremath≫kBTK, TK being the Kondo temperature, in agreement with recent transport measurements in molecular junctions. However, we find that this is no longer valid when \ensuremathℏ\mathrm\ensuremathΩ is of the order of a few times kBTK.