Exchange-correlation functionals
Testing exchange correlation functionals at fractional electron numbers
... approximate functionals, results deviate from these ideal ...five exchange–correlation functionals, and also the Hartree–Fock method, on a set of high-symmetry atoms: He, Li, Be, Na, ...
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Pseudopotentials for H to Kr optimized for gradient-corrected exchange-correlation functionals
... gradient-corrected exchange-correlation functionals of Becke, Lee, Yang, and Parr (BLYP), Becke and Perdew (BP), and Perdew, Burke, and Ernzerhof ...
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Evaluation of Exchange-Correlation Functionals for Calculating 1H and 13C NMR Chemical Shifts of a Series of Lactones and Lactams in Solution
... lactones and lactams were determined and analyzed. The theoretical NMR chemical shifts were calculated using density functional theory (DFT) and gauge independent atomic orbital (GIAO) approach in fourteen ...
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Exchange correlation functionals via local interpolation along the adiabatic connection
... strong correlation with symmetry breaking, some care must be taken when discussing size consis- ...exact exchange are not intensive quantities in the presence of near degeneracy, 67,68 which is the main ...
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Density-Functional Theory Exchange-Correlation Functionals for Hydrogen Bonds in Water
... these functionals for the equilibrium water dimer and other water clusters in the gas ...other functionals, it predicts an increasing error in dimer interaction energy for the longest O-H d ...
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Current density functional theory using meta generalized gradient exchange correlation functionals
... CDFT functionals and many avenues are open for ...mGGA functionals 57,58 to obtain a better balance of errors between exchange, correlation and current contributions and the ...
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On the accuracy of van der Waals inclusive density-functional theory exchange-correlation functionals for ice at ambient and high pressures
... xc functionals have been used to investigate the effects of vdW on the structural, energetic, and vibrational properties of liq- uid ...xc functionals there are indeed improvements in certain calculated ...
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On the accuracy of van der Waals inclusive density-functional theory exchange-correlation functionals for ice at ambient and high pressures
... xc functionals have been used to investigate the effects of vdW on the structural, energetic, and vibrational properties of liq- uid ...xc functionals there are indeed improvements in certain calculated ...
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On the Accuracy of van der Waals Inclusive Density-Functional Theory Exchange-Correlation Functionals for Ice at Ambient and High Pressures
... vdW functionals clearly highlights the importance of ac- counting for vdW in ...clusive functionals, capturing all of the experimentally characterized ice phases on the water phase diagram is clearly still ...
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Surface energies of simple metals from slabs: Comparison of exchange-correlation density functionals
... All surface energies are extracted from slab en- ergies with unrelaxed ionic planes (faces (111), (110), and (100) for fcc and bcc structures and (0001) face for hcp structures). The relaxation of the out- ermost layers ...
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The coupling constant averaged exchange–correlation energy density
... local functionals may be constructed to give a higher level of accuracy than that typical of ...orbital-dependent exchange–correlation functionals are developed and the corresponding KS equa- ...
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Approximation of Exchange-Correlation Potentials for Orbital- Dependent Functionals
... Dear Sir or Madam, I am a University of Western Ontario graduate student completing my Master’s thesis entitled “Efficient construction of exchange-correlation potentials for orbital- dependent ...
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Dependence of Structural and Electronic Properties of Uranium Monochalcogenides on Exchange–Correlation Energy Functionals
... So far, to our knowledge, there is only one first-principles study of the lattice constants and the bulk moduli; 25) the calculations were carried out for US and UTe using a full-potential linear muffin-tin-orbital method, ...
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Functional Derivatives of Meta-Generalized Gradient Approximation (Meta-GGA) Type Exchange-Correlation Density Functionals
... Type Exchange-Correlation Density Functionals Abstract Meta-generalized gradient approximation (meta-GGA) exchange-correlation density functionalsdepend on the Kohn-Sham (KS) orbitals ...
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Hartree-Fock exchange and hybrid functionals in ONETEP
... HFX setup Keyword and value Description Recommended value hfx_use_ri myname label for SW basis/metric to use short string hfx_max_l l max max. ang. mom. in SW basis ≥3 hfx_max_q q max number of spherical Bessels per l ...
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Correlation potentials and functionals in Hartree-Fock-Kohn-Sham theory
... crosses integer. In Kohn-Sham theory it can be shown 34,35 that for an open-shell system where e homo 5e lumo , the asymptotic potential is (I 2A)/2 where I and A are the ion- ization potential and electron affinity ...
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CiteSeerX — Coulomb-attenuated exchange energy density functionals
... Coulomb, exchange and correlation energies all stem from the Coulomb operators in the Schro $ dinger equation, all three must be attenuated together in any balanced ...Coulomb, exchange and ...
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Properties of field functionals and characterization of local functionals
... Along the way to these results, we prove interesting properties of general functionals that we briefly describe now. In section 2, we explain why we choose test func- tions that are only smooth instead of smooth ...
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Correlation Based Clustering of the Amman Stock Exchange
... In the correlation-based clustering, I suggest that a finer level classification can be obtained when stocks abnormal concentration in their groups falls. Abnormal concentration is measured as the difference ...
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Foreign Exchange Derivative Pricing with Stochastic Correlation
... serial correlation, which implied that there was no direct de- pendency which could be exploited to predict tomorrows’ returns based on today or pre- vious ...stochastic correlation performs better than ...
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