Phonon-assisted thermoelectric effects in a two-level molecule

Abstract

Thermoelectric properties of a two-level molecule attached to the metallic electrodes are analyzed using the equation of motion technique within the Green function formalism. Results show that the electrical conductance is strongly dependent on the electron and phonon temperatures and the electron-phonon coupling strength. In addition, it is observed that the thermal conductance peaks in the electron-hole symmetry points are vanished in the presence of the strong electron-phonon interaction. It is also found that the figure of merit is strongly suppressed in the strong electron-phonon interaction. The violation of the Wiedemann-Franz law is also observed coming from the Coulomb interactions.

13 pages, 6 figures

References in corpus (15)

• Molecular Transport Junctions: Vibrational Effects
• The Kondo effect in C${}_{60}$ single-molecule transistors
• Giant thermopower and figure of merit in single-molecule devices
• Optimal thermoelectric figure of merit of a molecular junction
• Violation of the Wiedemann-Franz Law in a Single-Electron Transistor
• Large enhancement of thermoelectric effects in a double quantum dot system due to interference and Coulomb correlation phenomena
• Multiterminal single-molecule--graphene-nanoribbon thermoelectric devices with gate-voltage tunable figure of merit ZT
• Theory for transport through a single magnetic molecule: Endohedral N@C60
• Phonon runaway in nanotube quantum dots
• Nonequilibrium isolated molecule limit
• Large violation of Wiedemann Franz law in Luttinger liquids
• Nonequilibrium transport through a spinful quantum dot with superconducting leads
• Fabry-Perot interference, Kondo effect and Coulomb blockade in carbon nanotubes
• Thermoelectric effects in a double quantum dot system weakly coupled to ferromagnetic leads
• Elimination of negative differential conductance in an asymmetric molecular transistor by an ac-voltage

Cited by in corpus (5)

• Electrothermal Transistor Effect and Cyclic Electronic Currents in Multithermal Charge Transfer Networks
• Electron-vibration effects on the thermoelectric efficiency of molecular junctions
• Delocalization of electrons by cavity photons in transport through a quantum dot molecule
• Interplay between electron-electron and electron-vibration interactions on the thermoelectric properties of molecular junctions
• Thermoelectric inversion in a resonant quantum dot-cavity system in the steady-state regime