学術雑誌論文 Third-order density-functional tight-binding combined with the fragment molecular orbital method

Nishimoto, Yoshio  ,  Fedorov, Dmitri G.  ,  Irle, Stephan

636pp.90 - 96 , 2015-09 , Elsevier B.V.
ISSN:0009-2614
NII書誌ID(NCID):AA00602122
内容記述
Available online 21 July 2015
We developed the energy and its analytic gradient for the self-consistent-charge density-functional tight-binding method with the third-order expansion (DFTB3) combined with the fragment molecular orbital (FMO) method, FMO-DFTB3. FMO-DFTB3 reproduced full DFTB3 relative stabilities and the optimized structures of three polyalanine isomers. FMO-DFTB3 was applied to optimize a nano flake of cellulose Iβ, consisting of 10 944 atoms, and a good agreement with the experimental structure was obtained. For a cellulose sheet containing 1368 atoms, FMO-DFTB3 was 43.5 times faster than full DFTB3. The binding between sheets and chains in cellulose was elucidated, and two dispersion models were compared.
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http://repository.kulib.kyoto-u.ac.jp/dspace/bitstream/2433/202011/1/j.cplett.2015.07.022.pdf

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