Van der Waals Density Functional for Layered Structures
Hanna A. Rydberg(Chalmers University of Technology), M. Dion(Rutgers, The State University of New Jersey), N. Jacobson(Chalmers University of Technology), Elsebeth Schröder(Chalmers University of Technology), Per Hyldgaard(Chalmers University of Technology), S. I. Simak(Chalmers University of Technology), David C. Langreth(Rutgers, The State University of New Jersey), Bengt I. Lundqvist(Chalmers University of Technology)
Cited by 699Open Access
Abstract
To understand sparse systems, we must account for both strong local atom bonds and weak nonlocal van der Waals forces between atoms separated by empty space. A fully nonlocal functional form [Phys. Rev. B 62, 6997 (2000)]] of density-functional theory (DFT) is applied here to the layered systems graphite, boron nitride, and molybdenum sulfide to compute bond lengths, binding energies, and compressibilities. These key examples show that the DFT with the generalized-gradient approximation does not apply for calculating properties of sparse matter, while use of the fully nonlocal version appears to be one way to proceed.
Related Papers
No related papers found
Powered by citation graph analysis