Rungs 1 to 4 of DFT Jacob's ladder: Extensive test on the lattice constant, bulk modulus, and cohesive energy of solids.

نویسندگان

  • Fabien Tran
  • Julia Stelzl
  • Peter Blaha
چکیده

A large panel of old and recently proposed exchange-correlation functionals belonging to rungs 1 to 4 of Jacob's ladder of density functional theory are tested (with and without a dispersion correction term) for the calculation of the lattice constant, bulk modulus, and cohesive energy of solids. Particular attention will be paid to the functionals MGGA_MS2 [J. Sun et al., J. Chem. Phys. 138, 044113 (2013)], mBEEF [J. Wellendorff et al., J. Chem. Phys. 140, 144107 (2014)], and SCAN [J. Sun et al., Phys. Rev. Lett. 115, 036402 (2015)] which are meta-generalized gradient approximations (meta-GGA) and are developed with the goal to be universally good. Another goal is also to determine for which semilocal functionals and groups of solids it is beneficial (or not necessary) to use the Hartree-Fock exchange or a dispersion correction term. It is concluded that for strongly bound solids, functionals of the GGA, i.e., rung 2 of Jacob's ladder, are as accurate as the more sophisticated functionals of the higher rungs, while it is necessary to use dispersion corrected functionals in order to expect at least meaningful results for weakly bound solids. If results for finite systems are also considered, then the meta-GGA functionals are overall clearly superior to the GGA functionals.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

بررسی خواص مکانیکی و گرمایی فلز کبالت با روش شبیه‌سازی دینامیک مولکولی

The thermal and mechanical properties of pure cobalt were studied by using the molecular dynamics (MD) simulation technique, in the temperature range from 200 K up to melting point. The Cleri-Rosato many-body potential was used as interatomic potential. This MD simulation was employed at the constant pressure, constant temperature (NPT) ensemble. The temperature and pressure of the system were ...

متن کامل

A first-principles DFT study of UN bulk and (001) surface: Comparative LCAO and PW calculations

LCAO and PW DFT calculations of the lattice constant, bulk modulus, cohesive energy, charge distribution, band structure, and DOS for UN single crystal are analyzed. It is demonstrated that a choice of the uranium atom relativistic effective core potentials considerably affects the band structure and magnetic structure at low temperatures. All calculations indicate mixed metallic-covalent chemi...

متن کامل

Size Dependence of the Elastic Properties of Pd Nanowire: Molecular Dynamics Simulation

The mechanical properties including elastic stiffness constants as well as bulk modulus of Palladium (Pd) nanowire were calculated in the constant temperature and pressure (NPT), ensemble by molecular dynamics (MD) simulation technique. The quantum Sutton-Chen (Q-SC) many-body potential was used to calculate the cohesive energy as well as forces experience by every atoms. The temperature and pr...

متن کامل

Benchmark Databases for Nonbonded Interactions and Their Use To Test Density Functional Theory.

We present four benchmark databases of binding energies for nonbonded complexes. Four types of nonbonded interactions are considered:  hydrogen bonding, charge transfer, dipole interactions, and weak interactions. We tested 44 DFT methods and 1 WFT method against the new databases; one of the DFT methods (PBE1KCIS) is new, and all of the other methods are from the literature. Among the tested m...

متن کامل

Relativistic calculations to assess the ability of the generalized gradient approximation to reproduce trends in cohesive properties of solids

We have performed density functional calculations on solids in four columns of the periodic table, containing the elements Ca, Sr, Ba, As, Sb, Bi, Cu, Ag, Au, Ce, and Th. In order to get a meaningful estimation of the quality of the generalized gradient approximation ~GGA! to predict trends within a column, as few other approximations were made as possible. Most notably, the spin-orbit effect h...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • The Journal of chemical physics

دوره 144 20  شماره 

صفحات  -

تاریخ انتشار 2016