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Title: Generalized extended Lagrangian Born-Oppenheimer molecular dynamics

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.4898803· OSTI ID:1184028
 [1];  [1]
  1. Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA

Extended Lagrangian Born-Oppenheimer molecular dynamics based on Kohn-Sham density functional theory is generalized in the limit of vanishing self-consistent field optimization prior to the force evaluations. The equations of motion are derived directly from the extended Lagrangian under the condition of an adiabatic separation between the nuclear and the electronic degrees of freedom. We show how this separation is automatically fulfilled and system independent. The generalized equations of motion require only one diagonalization per time step and are applicable to a broader range of materials with improved accuracy and stability compared to previous formulations.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC52-06NA25396; FWP#LANL20101053
OSTI ID:
1184028
Alternate ID(s):
OSTI ID: 1212192; OSTI ID: 1416453
Journal Information:
Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Vol. 141 Journal Issue: 16; ISSN 0021-9606
Publisher:
American Institute of PhysicsCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 42 works
Citation information provided by
Web of Science

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