Testing several recent van der Waals density functionals for layered structures
نویسندگان
چکیده
منابع مشابه
Van der Waals density functional for layered structures.
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 compr...
متن کاملInterpretation of van der Waals density functionals
The nonlocal correlation energy in the van der Waals density functional (vdW-DF) method can be interpreted in terms of a coupling of zero-point energies of characteristic modes of semilocal exchange-correlation (xc) holes. These xc holes reflect the internal functional in the framework of the vdW-DF method. We explore the internal xc hole components, showing that they share properties with thos...
متن کاملBenchmark Assessment of the Accuracy of Several van der Waals Density Functionals.
The nonlocal correlation functional VV10, developed recently in our group, describes the whole range of dispersion interactions in a seamless and general fashion using only the electron density as input. The VV10 functional has a simple analytic form that can be adjusted for pairing with the exchange functional of choice. In this paper, we use several benchmark data sets of weakly interacting m...
متن کاملComparing van der Waals Density Functionals for CO2 Adsorption in Metal Organic Frameworks
The accuracy of five recently proposed van der Waals (vdW) density functionals (optB86b, optB88, optPBE, revPBE, and rPW86), the semiempirical vdW method of Grimme (DFT-D2), and conventional local (LDA) and gradient-corrected (GGA-PBE) density functionals are assessed with respect to experimental enthalpies (ΔH) for CO2 adsorption in four prototypical metal organic frameworks (MOFs) containing ...
متن کاملNaSn2As2: An Exfoliatable Layered van der Waals Zintl Phase.
The discovery of new families of exfoliatable 2D crystals that have diverse sets of electronic, optical, and spin-orbit coupling properties, enables the realization of unique physical phenomena in these few-atom thick building blocks and in proximity to other materials. Herein, using NaSn2As2 as a model system, we demonstrate that layered Zintl phases having the stoichiometry ATt2Pn2 (A = Group...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of Chemical Physics
سال: 2014
ISSN: 0021-9606,1089-7690
DOI: 10.1063/1.4893329