Journal Article

FZJ-2018-06837

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Nonequilibrium thermoelectric transport through vibrating molecular quantum dots

Khedri, A.FZJ* ; Costi, T. (Corresponding author)FZJ* ; Meden, V.

2018
Inst. Woodbury, NY

This record in other databases:    

Please use a persistent id in citations: http://hdl.handle.net/2128/20202  doi:10.1103/PhysRevB.98.195138

Abstract: We employ the functional renormalization group to study the effects of phonon-assisted tunneling on the nonequilibrium steady-state transport through a single level molecular quantum dot coupled to electronic leads. Within the framework of the spinless Anderson-Holstein model we focus on small to intermediate electron-phonon couplings and we explore the evolution from the adiabatic to the antiadiabatic limit and also from the low-temperature nonperturbative regime to the high-temperature perturbative one. We identify the phononic signatures in the bias-voltage dependence of the electrical current and the differential conductance. Considering a temperature gradient between the electronic leads we further investigate the interplay between the transport of charge and heat. Within the linear response regime we compare the temperature dependence of various thermoelectric coefficients to our earlier results obtained within the numerical renormalization group [Phys. Rev. B 96, 195156 (2017)]. Beyond the linear response regime in the context of thermoelectric generators we discuss the influence of molecular vibrations on the output power and the efficiency. We find that in the antiadiabatic limit the thermoelectric efficiency can be significantly enhanced.

---

Contributing Institute(s):

1. Theoretische Nanoelektronik (IAS-3)
2. Theoretische Nanoelektronik (PGI-2)
3. JARA-FIT (JARA-FIT)
4. JARA - HPC (JARA-HPC)

Research Program(s):

1. 142 - Controlling Spin-Based Phenomena (POF3-142) (POF3-142)
2. Thermoelectric properties of molecular quantum dots and time-dependent response of quantum dots (jiff23_20140501) (jiff23_20140501)

Appears in the scientific report 2018

---

Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

---