This title appears in the Scientific Report :
2024
Please use the identifier:
http://dx.doi.org/10.1088/2516-1075/ad1614 in citations.
Please use the identifier: http://dx.doi.org/10.34734/FZJ-2024-00260 in citations.
Phonons from density-functional perturbation theory using the all-electron full-potential linearized augmented plane-wave method FLEUR *
Phonons from density-functional perturbation theory using the all-electron full-potential linearized augmented plane-wave method FLEUR *
Phonons are quantized vibrations of a crystal lattice that play a crucial role in understanding many properties of solids. Density functional theory provides a state-of-the-art computational approach to lattice vibrations from first-principles. We present a successful software implementation for cal...
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Personal Name(s): | Gerhorst, Christian-Roman (Corresponding author) |
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Neukirchen, Alexander (Corresponding author) / Klüppelberg, Daniel A / Bihlmayer, Gustav / Betzinger, Markus / Michalicek, Gregor / Wortmann, Daniel / Blügel, Stefan | |
Contributing Institute: |
JARA - HPC; JARA-HPC JARA-FIT; JARA-FIT Quanten-Theorie der Materialien; PGI-1 Quanten-Theorie der Materialien; IAS-1 |
Published in: | Electronic structure, 6 (2024) 1, S. 017001 - |
Imprint: |
Philadelphia, PA
IOP Publishing Ltd.
2024
|
DOI: |
10.1088/2516-1075/ad1614 |
DOI: |
10.34734/FZJ-2024-00260 |
Document Type: |
Journal Article |
Research Program: |
MAterials design at the eXascale. European Centre of Excellence in materials modelling, simulations, and design Topological Matter |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.34734/FZJ-2024-00260 in citations.
Phonons are quantized vibrations of a crystal lattice that play a crucial role in understanding many properties of solids. Density functional theory provides a state-of-the-art computational approach to lattice vibrations from first-principles. We present a successful software implementation for calculating phonons in the harmonic approximation, employing density-functional perturbation theory within the framework of the full-potential linearized augmented plane-wave method as implemented in the electronic structure package FLEUR. The implementation, which involves the Sternheimer equation for the linear response of the wave function, charge density, and potential with respect to infinitesimal atomic displacements, as well as the setup of the dynamical matrix, is presented and the specifics due to the muffin-tin sphere centered linearized augmented plane-wavebasis-set and the all-electron nature are discussed. As a test, we calculate the phonon dispersion of several solids including an insulator, a semiconductor as well as several metals. The latter arecomprised of magnetic, simple, and transition metals. The results are validated on the basis of phonon dispersions calculated using the finite displacement approach in conjunction with theFLEUR code and the phonopy package, as well as by some experimental results. An excellent agreement is obtained. |