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Title: Improving Rydberg Excitations within Time-Dependent Density Functional Theory with Generalized Gradient Approximations: The Exchange-Enhancement-for-Large-Gradient Scheme

Abstract

Time-dependent density functional theory (TDDFT) with conventional local and hybrid functionals such as the local and hybrid generalized gradient approximations (GGA) seriously underestimates the excitation energies of Rydberg states, which limits its usefulness for applications such as spectroscopy and photochemistry. We present here a scheme that modifies the exchange-enhancement factor to improve GGA functionals for Rydberg excitations within the TDDFT framework while retaining their accuracy for valence excitations and for the thermochemical energetics calculated by ground-state density functional theory. The scheme is applied to a popular hybrid GGA functional and tested on data sets of valence and Rydberg excitations and atomization energies, and the results are encouraging. The scheme is simple and flexible. It can be used to correct existing functionals, and it can also be used as a strategy for the development of new functionals.

Authors:
 [1];  [1]
  1. Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
Publication Date:
Research Org.:
Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1252036
Alternate Identifier(s):
OSTI ID: 1455126
Grant/Contract Number:  
SC0008666
Resource Type:
Published Article
Journal Name:
Journal of Chemical Theory and Computation
Additional Journal Information:
Journal Name: Journal of Chemical Theory and Computation Journal Volume: 11 Journal Issue: 7; Journal ID: ISSN 1549-9618
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Li, Shaohong L., and Truhlar, Donald G. Improving Rydberg Excitations within Time-Dependent Density Functional Theory with Generalized Gradient Approximations: The Exchange-Enhancement-for-Large-Gradient Scheme. United States: N. p., 2015. Web. doi:10.1021/acs.jctc.5b00369.
Li, Shaohong L., & Truhlar, Donald G. Improving Rydberg Excitations within Time-Dependent Density Functional Theory with Generalized Gradient Approximations: The Exchange-Enhancement-for-Large-Gradient Scheme. United States. https://doi.org/10.1021/acs.jctc.5b00369
Li, Shaohong L., and Truhlar, Donald G. Wed . "Improving Rydberg Excitations within Time-Dependent Density Functional Theory with Generalized Gradient Approximations: The Exchange-Enhancement-for-Large-Gradient Scheme". United States. https://doi.org/10.1021/acs.jctc.5b00369.
@article{osti_1252036,
title = {Improving Rydberg Excitations within Time-Dependent Density Functional Theory with Generalized Gradient Approximations: The Exchange-Enhancement-for-Large-Gradient Scheme},
author = {Li, Shaohong L. and Truhlar, Donald G.},
abstractNote = {Time-dependent density functional theory (TDDFT) with conventional local and hybrid functionals such as the local and hybrid generalized gradient approximations (GGA) seriously underestimates the excitation energies of Rydberg states, which limits its usefulness for applications such as spectroscopy and photochemistry. We present here a scheme that modifies the exchange-enhancement factor to improve GGA functionals for Rydberg excitations within the TDDFT framework while retaining their accuracy for valence excitations and for the thermochemical energetics calculated by ground-state density functional theory. The scheme is applied to a popular hybrid GGA functional and tested on data sets of valence and Rydberg excitations and atomization energies, and the results are encouraging. The scheme is simple and flexible. It can be used to correct existing functionals, and it can also be used as a strategy for the development of new functionals.},
doi = {10.1021/acs.jctc.5b00369},
journal = {Journal of Chemical Theory and Computation},
number = 7,
volume = 11,
place = {United States},
year = {Wed Jun 17 00:00:00 EDT 2015},
month = {Wed Jun 17 00:00:00 EDT 2015}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1021/acs.jctc.5b00369

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Works referencing / citing this record:

Perspective: Kohn-Sham density functional theory descending a staircase
journal, October 2016

  • Yu, Haoyu S.; Li, Shaohong L.; Truhlar, Donald G.
  • The Journal of Chemical Physics, Vol. 145, Issue 13
  • DOI: 10.1063/1.4963168

The ring-opening channel and the influence of Rydberg states on the excited state dynamics of furan and its derivatives
journal, August 2018

  • Schalk, O.; Geng, T.; Hansson, T.
  • The Journal of Chemical Physics, Vol. 149, Issue 8
  • DOI: 10.1063/1.5024655