Abstract
We report a comparison of two linear-scaling methods which avoid the diagonalization bottleneck of traditional electronic structure algorithms. The Chebyshev expansion method (CEM) is implemented for carbon tight-binding calculations of large systems and its memory and timing requirements compared to those of our previously implemented conjugate gradient density matrix search (CG-DMS). Benchmark calculations are carried out on icosahedral fullerenes from C60 to C8640 and the linear scaling memory and CPU requirements of the CEM demonstrated. We show that the CPU requisites of the CEM and CG-DMS are similar for calculations with comparable accuracy.
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Dates
Type | When |
---|---|
Created | 23 years, 1 month ago (July 26, 2002, 8:17 a.m.) |
Deposited | 2 years, 2 months ago (June 26, 2023, 7:48 a.m.) |
Indexed | 1 year, 6 months ago (Feb. 10, 2024, 9:59 p.m.) |
Issued | 27 years ago (Sept. 1, 1998) |
Published | 27 years ago (Sept. 1, 1998) |
Published Print | 27 years ago (Sept. 1, 1998) |
@article{Bates_1998, title={Comparison of conjugate gradient density matrix search and Chebyshev expansion methods for avoiding diagonalization in large-scale electronic structure calculations}, volume={109}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.476927}, DOI={10.1063/1.476927}, number={9}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Bates, Kevin R. and Daniels, Andrew D. and Scuseria, Gustavo E.}, year={1998}, month=sep, pages={3308–3312} }