Projects per year
Abstract
The density functional tight binding (DFTB) method is a fast, semi-empirical, total energy electronic structure method based upon and parameterized to density functional theory (DFT). The standard self-consistent charge (SCC) DFTB approximates the charge fluctuations in a system using a multipole expansion truncated to the monopole term. For systems with asymmetric charge distributions, such as might be induced by an applied external field, higher terms in the multipole expansion are likely to be important. We have extended the formalism to include dipoles (SCCD), have implemented the method computationally, and test it by calculating the response of various carbon nanotubes and fullerenes to an applied electric field. A comparison of polarizabilities with experimental data or more sophisticated DFT calculations indicates a substantial improvement over standard SCC-DFTB. We also discuss the issues surrounding parameterization of the new SCCD-DFTB scheme.
Original language | English |
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Pages (from-to) | 206-213 |
Journal | Computational Materials Science |
Volume | 134 |
Early online date | 14 Apr 2017 |
DOIs | |
Publication status | Published - 15 Jun 2017 |
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Dive into the research topics of 'Self-consistent charge and dipole density functional tight binding method and application to carbon-based systems'. Together they form a unique fingerprint.Projects
- 2 Finished
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Fundamental Research and Applications in Nano-Electronics, Photonics, Engineering and Bio-Sciences
Bending, S. (PI), Ilie, A. (CoI) & Millar, J. (CoI)
Engineering and Physical Sciences Research Council
1/10/09 → 31/03/15
Project: Research council
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Local Electronic Properties in Carbon Nanotube Hybrids
Ilie, A. (PI)
Engineering and Physical Sciences Research Council
1/12/08 → 31/05/12
Project: Research council