Document Detail


Car-Parrinello treatment for an approximate density-functional theory method.
MedLine Citation:
PMID:  17411104     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
The authors formulate a Car-Parrinello treatment for the density-functional-based tight-binding method with and without self-consistent charge corrections. This method avoids the numerical solution of the secular equations, the principal drawback for large systems if the linear combination of atomic orbital ansatz is used. The formalism is applicable to finite systems and for supercells using periodic boundary conditions within the Gamma-point approximation. They show that the methodology allows the application of modern computational techniques such as sparse matrix storage and massive parallelization in a straightforward way. All present bottlenecks concerning computer time and consumption of memory and memory bandwidth can be removed. They illustrate the performance of the method by direct comparison with Born-Oppenheimer molecular dynamics calculations. Water molecules, benzene, the C(60) fullerene, and liquid water have been selected as benchmark systems.
Authors:
Mathias Rapacioli; Robert Barthel; Thomas Heine; Gotthard Seifert
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of chemical physics     Volume:  126     ISSN:  0021-9606     ISO Abbreviation:  J Chem Phys     Publication Date:  2007 Mar 
Date Detail:
Created Date:  2007-04-06     Completed Date:  2007-10-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0375360     Medline TA:  J Chem Phys     Country:  United States    
Other Details:
Languages:  eng     Pagination:  124103     Citation Subset:  -    
Affiliation:
Institut für Physikalische Chemie und Elektrochemie, TU Dresden, Mommenstrassse 13, D-01062 Dresden, Germany.
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