Can I read Efficient implementation of a van der Waals density functional: Application to double-wall carbon nanotubes on EtoBox?

Efficient implementation of a van der Waals density functional: Application to double-wall carbon nanotubes by Roman-Perez, Guillermo; Soler, Jose M. is a scholarly article available to read on EtoBox.

What is Efficient implementation of a van der Waals density functional: Application to double-wall carbon nanotubes about?

We present an efficient implementation of the van der Waals density functional of Dion et al [Phys. Rev. Lett. 92, 246401 (2004)], which expresses the nonlocal correlation energy as a double spacial integral. We factorize the integration kernel and use fast Fourier transforms to evaluate the selfconsistent potential, total energy, and atomic forces, in N log(N) operations. The resulting overhead in total computational cost, over semilocal functionals, is very moderate for medium and large systems. We apply the method to calculate the binding energies and the barriers for relative translation and rotation in double-wall carbon nanotubes.

Author

Roman-Perez, Guillermo; Soler, Jose M.

Published

2008

Language

EN