Affiliation:
1. Otto Schott Institute of Materials Research, Friedrich Schiller University Jena 1 , Löbdergraben 32, 07743 Jena, Germany
2. Institute of Theoretical Solid State Physics, Karlsruhe Institute of Technology (KIT) 2 , Wolfgang-Gaede-Straße 1, 76131 Karlsruhe, Germany
Abstract
Spin–orbit coupling induces a current density in the ground state, which consequently requires a generalization for meta-generalized gradient approximations. That is, the exchange–correlation energy has to be constructed as an explicit functional of the current density, and a generalized kinetic energy density has to be formed to satisfy theoretical constraints. Herein, we generalize our previously presented formalism of spin–orbit current density functional theory [Holzer et al., J. Chem. Phys. 157, 204102 (2022)] to non-magnetic and magnetic periodic systems of arbitrary dimension. In addition to the ground-state exchange–correlation potential, analytical derivatives such as geometry gradients and stress tensors are implemented. The importance of the current density is assessed for band gaps, lattice constants, magnetic transitions, and Rashba splittings. In the latter, the impact of the current density may be larger than the deviation between different density functional approximations.
Funder
Deutsche Forschungsgemeinschaft
Volkswagen Foundation
Cited by
1 articles.
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