scispace - formally typeset
Topic

Projector augmented wave method

About: Projector augmented wave method is a(n) research topic. Over the lifetime, 366 publication(s) have been published within this topic receiving 166609 citation(s).

...read more

Papers
  More

Open accessJournal ArticleDOI: 10.1103/PHYSREVB.50.17953
Peter E. Blöchl1Institutions (1)
15 Dec 1994-Physical Review B
Abstract: An approach for electronic structure calculations is described that generalizes both the pseudopotential method and the linear augmented-plane-wave (LAPW) method in a natural way. The method allows high-quality first-principles molecular-dynamics calculations to be performed using the original fictitious Lagrangian approach of Car and Parrinello. Like the LAPW method it can be used to treat first-row and transition-metal elements with affordable effort and provides access to the full wave function. The augmentation procedure is generalized in that partial-wave expansions are not determined by the value and the derivative of the envelope function at some muffin-tin radius, but rather by the overlap with localized projector functions. The pseudopotential approach based on generalized separable pseudopotentials can be regained by a simple approximation.

...read more

48,474 Citations


Journal ArticleDOI: 10.1016/0927-0256(96)00008-0
Georg Kresse1, Jürgen Furthmüller2Institutions (2)
Abstract: We present a detailed description and comparison of algorithms for performing ab-initio quantum-mechanical calculations using pseudopotentials and a plane-wave basis set. We will discuss: (a) partial occupancies within the framework of the linear tetrahedron method and the finite temperature density-functional theory, (b) iterative methods for the diagonalization of the Kohn-Sham Hamiltonian and a discussion of an efficient iterative method based on the ideas of Pulay's residual minimization, which is close to an order Natoms2 scaling even for relatively large systems, (c) efficient Broyden-like and Pulay-like mixing methods for the charge density including a new special ‘preconditioning’ optimized for a plane-wave basis set, (d) conjugate gradient methods for minimizing the electronic free energy with respect to all degrees of freedom simultaneously. We have implemented these algorithms within a powerful package called VAMP (Vienna ab-initio molecular-dynamics package). The program and the techniques have been used successfully for a large number of different systems (liquid and amorphous semiconductors, liquid simple and transition metals, metallic and semi-conducting surfaces, phonons in simple metals, transition metals and semiconductors) and turned out to be very reliable.

...read more

Topics: Projector augmented wave method (55%), Conjugate gradient method (55%), Iterative method (54%) ...read more

40,008 Citations


Journal ArticleDOI: 10.1103/PHYSREVB.47.558
Georg Kresse1, Jürgen Hafner1Institutions (1)
01 Jan 1993-Physical Review B
Abstract: We present ab initio quantum-mechanical molecular-dynamics calculations based on the calculation of the electronic ground state and of the Hellmann-Feynman forces in the local-density approximation at each molecular-dynamics step. This is possible using conjugate-gradient techniques for energy minimization, and predicting the wave functions for new ionic positions using subspace alignment. This approach avoids the instabilities inherent in quantum-mechanical molecular-dynamics calculations for metals based on the use of a fictitious Newtonian dynamics for the electronic degrees of freedom. This method gives perfect control of the adiabaticity and allows us to perform simulations over several picoseconds.

...read more

27,360 Citations


Journal ArticleDOI: 10.1103/PHYSREVB.41.7892
David Vanderbilt1Institutions (1)
15 Apr 1990-Physical Review B
Abstract: A new approach to the construction of first-principles pseudopotentials is described. The method allows transferability to be improved systematically while holding the cutoff radius fixed, even for large cutoff radii. Novel features are that the pseudopotential itself becomes charge-state dependent, the usual norm-conservation constraint does not apply, and a generalized eigenproblem is introduced. The potentials have a separable form well suited for plane-wave solid-state calculations, and show promise for application to first-row and transition-metal systems.

...read more

17,261 Citations


Open accessJournal ArticleDOI: 10.1103/PHYSREVB.23.5048
John P. Perdew1, Alex Zunger2Institutions (2)
15 May 1981-Physical Review B
Abstract: The exact density functional for the ground-state energy is strictly self-interaction-free (i.e., orbitals demonstrably do not self-interact), but many approximations to it, including the local-spin-density (LSD) approximation for exchange and correlation, are not. We present two related methods for the self-interaction correction (SIC) of any density functional for the energy; correction of the self-consistent one-electron potenial follows naturally from the variational principle. Both methods are sanctioned by the Hohenberg-Kohn theorem. Although the first method introduces an orbital-dependent single-particle potential, the second involves a local potential as in the Kohn-Sham scheme. We apply the first method to LSD and show that it properly conserves the number content of the exchange-correlation hole, while substantially improving the description of its shape. We apply this method to a number of physical problems, where the uncorrected LSD approach produces systematic errors. We find systematic improvements, qualitative as well as quantitative, from this simple correction. Benefits of SIC in atomic calculations include (i) improved values for the total energy and for the separate exchange and correlation pieces of it, (ii) accurate binding energies of negative ions, which are wrongly unstable in LSD, (iii) more accurate electron densities, (iv) orbital eigenvalues that closely approximate physical removal energies, including relaxation, and (v) correct longrange behavior of the potential and density. It appears that SIC can also remedy the LSD underestimate of the band gaps in insulators (as shown by numerical calculations for the rare-gas solids and CuCl), and the LSD overestimate of the cohesive energies of transition metals. The LSD spin splitting in atomic Ni and $s\ensuremath{-}d$ interconfigurational energies of transition elements are almost unchanged by SIC. We also discuss the admissibility of fractional occupation numbers, and present a parametrization of the electron-gas correlation energy at any density, based on the recent results of Ceperley and Alder.

...read more

14,881 Citations


Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20212
20208
201912
20188
201713
201616

Top Attributes

Show by:

Topic's top 5 most impactful authors

Georg Kresse

12 papers, 68.4K citations

Francesco Mauri

9 papers, 2.4K citations

Chris J. Pickard

6 papers, 1K citations

Peter E. Blöchl

6 papers, 349 citations

Helena M. Petrilli

5 papers, 65 citations

Network Information
Related Topics (5)
Hybrid functional

4K papers, 734.2K citations

84% related
Fermi level

27.1K papers, 652.4K citations

83% related
Density of states

26.5K papers, 617.1K citations

83% related
Vacancy defect

22.7K papers, 501.6K citations

83% related
Ab initio

57.3K papers, 1.6M citations

83% related