We derive a set of generalized master equations (GMEs) to study charge transport dynamics in molecular junctions using the Nakajima–Zwanzig–Mori projection operator approach. In the new GME, time derivatives of population on each quantum state of the molecule, as well as the tunneling current, are calculated as the convolution of time non-local memory kernels with populations on all system states. The non-Markovian memory kernels are obtained by combining the hierarchical equations of motion (HEOM) method and a previous derived Dyson relation for the exact kernel. A perturbative expansion of these memory kernels is then calculated using the extended HEOM developed in our previous work [M. Xu et al., J. Chem. Phys. 146, 064102 (2017)]. By using the resonant level model and the Anderson impurity model, we study properties of the exact memory kernels and analyze convergence properties of their perturbative expansions with respect to the system–bath coupling strength and the electron–electron repulsive energy. It is found that exact memory kernels calculated from HEOM exhibit short memory times and decay faster than the population and current dynamics. The high order perturbation expansion of the memory kernels can give converged results in certain parameter regimes. The Padé and Landau–Zener resummation schemes are also found to give improved results over low order perturbation theory.
Skip Nav Destination
Article navigation
7 April 2022
Research Article|
April 07 2022
Generalized master equation for charge transport in a molecular junction: Exact memory kernels and their high order expansion
Xiaohan Dan
;
Xiaohan Dan
Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences
, Zhongguancun, Beijing 100190, China
and University of Chinese Academy of Sciences
, Beijing 100049, China
Search for other works by this author on:
Meng Xu
;
Meng Xu
Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences
, Zhongguancun, Beijing 100190, China
and University of Chinese Academy of Sciences
, Beijing 100049, China
Search for other works by this author on:
Yaming Yan
;
Yaming Yan
Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences
, Zhongguancun, Beijing 100190, China
and University of Chinese Academy of Sciences
, Beijing 100049, China
Search for other works by this author on:
Qiang Shi
Qiang Shi
a)
Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences
, Zhongguancun, Beijing 100190, China
and University of Chinese Academy of Sciences
, Beijing 100049, China
a)Author to whom correspondence should be addressed: qshi@iccas.ac.cn
Search for other works by this author on:
a)Author to whom correspondence should be addressed: qshi@iccas.ac.cn
J. Chem. Phys. 156, 134114 (2022)
Article history
Received:
January 27 2022
Accepted:
March 16 2022
Citation
Xiaohan Dan, Meng Xu, Yaming Yan, Qiang Shi; Generalized master equation for charge transport in a molecular junction: Exact memory kernels and their high order expansion. J. Chem. Phys. 7 April 2022; 156 (13): 134114. https://doi.org/10.1063/5.0086663
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
DeePMD-kit v2: A software package for deep potential models
Jinzhe Zeng, Duo Zhang, et al.
CREST—A program for the exploration of low-energy molecular chemical space
Philipp Pracht, Stefan Grimme, et al.
Related Content
Convergence of high order memory kernels in the Nakajima-Zwanzig generalized master equation and rate constants: Case study of the spin-boson model
J. Chem. Phys. (April 2018)
Theoretical study of charge carrier transport in organic molecular crystals using the Nakajima-Zwanzig-Mori generalized master equation
J. Chem. Phys. (June 2019)
Resummed memory kernels in generalized system-bath master equations
J. Chem. Phys. (August 2014)
Convergence of high order perturbative expansions in open system quantum dynamics
J. Chem. Phys. (February 2017)
On the accuracy of the Padé-resummed master equation approach to dissipative quantum dynamics
J. Chem. Phys. (April 2016)