Time-dependent density-functional theory for real-time electronic dynamics on material surfaces

Abstract

The real-time electronic dynamics on material surfaces is critically important to a variety of applications. However, their simulations have remained challenging for conventional methods such as the time-dependent density-functional theory (TDDFT) for isolated and periodic systems. By extending the applicability of TDDFT to systems with open boundaries, we achieve accurate atomistic simulations of real-time electronic response to local perturbations on material surfaces. Two prototypical scenarios are exemplified: the relaxation of an excess electron on graphene surface, and the electron transfer across the molecule-graphene interface. Both the transient and long-time asymptotic dynamics are validated, which accentuates the fundamental importance and unique usefulness of an open-system TDDFT approach. The simulations also provide insights into the characteristic features of temporal electron evolution and dissipation on surfaces of bulk materials.

5 pages, 4 figures

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Cited by in corpus (12)

• Velocity-gauge real-time TDDFT within a numerical atomic orbital basis set
• Hierarchical equations of motion for impurity solver in dynamical mean-field theory
• Local Temperatures Out of Equilibrium
• The Driven Liouville von Neumann Equation in Lindblad Form
• Quantum simulation of exact electron dynamics can be more efficient than classical mean-field methods
• Time-linear quantum transport simulations with correlated nonequilibrium Green's functions
• Transient probing of the symmetry and the asymmetry of electron interference
• Evaluation of Dynamical Properties of Open Quantum Systems Using the Driven Liouville-von Neumann Approach: Methodological Considerations
• Emergence of Bloch oscillations in one-dimensional systems
• Time-dependent framework for energy and charge currents in nanoscale systems
• Valence and core excitons in solids from velocity-gauge real-time TDDFT with range-separated hybrid functionals: An LCAO approach
• A State Representation Approach for Atomistic Time-Dependent Transport Calculations in Molecular Junctions