Zobrazeno 1 - 10
of 120
pro vyhledávání: '"Härtle, R."'
Publikováno v:
Phys. Rev. B 97, 235429 (2018)
We present a novel hierarchical quantum master equation (HQME) approach which provides a numerically exact description of nonequilibrium charge transport in nanosystems with electronic-vibrational coupling. In contrast to previous work [Phys. Rev. B
Externí odkaz:
http://arxiv.org/abs/1802.09283
Publikováno v:
Phys. Rev. B 98, 081404 (2018)
We demonstrate the possiblity to cool nanoelectronic systems in nonequilibrium situations by increasing the temperature of the environment. Such cooling by heating is possible for a variety of experimental conditions where the relevant transport-indu
Externí odkaz:
http://arxiv.org/abs/1801.07264
Publikováno v:
Phys. Rev. B 94, 201407 (2016)
Within the hierarchical quantum master equation (HQME) framework, an approach is presented, which allows a numerically exact description of nonequilibrium charge transport in nanosystems with strong electronic-vibrational coupling. The method is appl
Externí odkaz:
http://arxiv.org/abs/1609.05149
Publikováno v:
Phys. Rev. B 92, 085430 (2015)
We give a detailed comparison of the hierarchical quantum master equation (HQME) method to a continuous-time quantum Monte Carlo (CT-QMC) approach, assessing the usability of these numerically exact schemes as impurity solvers in practical nonequilib
Externí odkaz:
http://arxiv.org/abs/1505.01283
Publikováno v:
Phys. Rev. B 91, 195418 (2015)
The interaction between electronic and vibrational degrees of freedom in single-molecule junctions may result from the dependence of the electronic energies or the electronic states of the molecular bridge on the nuclear displacement. The latter mech
Externí odkaz:
http://arxiv.org/abs/1411.5844
Autor:
Härtle, R., Millis, A. J.
Publikováno v:
Phys. Rev. B 90, 245426 (2014)
We theoretically investigate the full time evolution of a nonequilibrium double quantum dot structure from initial conditions corresponding to different product states (no entanglement between dot and lead) to a nonequilibrium steady state. The struc
Externí odkaz:
http://arxiv.org/abs/1409.3504
Publikováno v:
Phys. Rev. B 90, 075409 (2014)
The influence of multiple vibrational modes on current fluctuations in electron transport through single-molecule junctions is investigated. Our analysis is based on a generic model of a molecular junction, which comprises a single electronic state o
Externí odkaz:
http://arxiv.org/abs/1405.1337
Publikováno v:
J. Mol. Model. 20, 2163 (2014)
A novel mechanism for switching a molecular junction based on a proton transfer reaction triggered by an external electrostatic field is proposed. As a specific example to demonstrate the feasibility of the mechanism, the tautomers [2,5-(4-hydroxypyr
Externí odkaz:
http://arxiv.org/abs/1401.7808
Publikováno v:
Phys. Rev. B 88, 235426 (2013)
The interplay between interference effects and electron-electron interactions in electron transport through an interacting double quantum dot system is investigated using a hierarchical quantum master equation approach which becomes exact if carried
Externí odkaz:
http://arxiv.org/abs/1309.1170
Publikováno v:
Phys. Status Solidi B 250, 2365 (2013)
Vibrationally coupled electron transport through single-molecule junctions is considered. Reviewing our recent theoretical work, we show that electron-hole pair creation processes represent the key to understand the vibrational excitation characteris
Externí odkaz:
http://arxiv.org/abs/1304.4846