Relaxation of photoexcitations in polaron-induced magnetic microstructures
2018 | journal article; research paper. A publication with affiliation to the University of Göttingen.
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Relaxation of photoexcitations in polaron-induced magnetic microstructures
Köhler, T.; Rajpurohit, S.; Schumann, O.; Paeckel, S.; Biebl, F. R. A.; Sotoudeh, M. & Kramer, S. C. et al. (2018)
Physical Review. B, 97(23). DOI: https://doi.org/10.1103/PhysRevB.97.235120
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Details
- Authors
- Köhler, Thomas; Rajpurohit, Sangeeta; Schumann, Ole; Paeckel, Sebastian; Biebl, Fabian R. A.; Sotoudeh, Mohsen; Kramer, Stephan C.; Blöchl, Peter E. ; Kehrein, Stefan K. ; Manmana, Salvatore R.
- Abstract
- We investigate the evolution of a photoexcitation in correlated materials over a wide range of time scales. The system studied is a one-dimensional model of a manganite with correlated electron, spin, orbital, and lattice degrees of freedom, which we relate to the three-dimensional material Pr$_{1-x}$Ca$_{x}$MnO$_3$. The ground-state phases for the entire composition range are determined and rationalized by a coarse-grained polaron model. At half-doping a pattern of antiferromagnetically coupled Zener polarons is realized. Using time-dependent density-matrix renormalization group (tDMRG), we treat the electronic quantum dynamics following the excitation. The emergence of quasiparticles is addressed, and the relaxation of the nonequilibrium quasiparticle distribution is investigated via a linearized quantum-Boltzmann equation. Our approach shows that the magnetic microstructure caused by the Zener polarons leads to an increase of the relaxation times of the excitation.
- Issue Date
- 2018
- Journal
- Physical Review. B
- Project
- SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen
SFB 1073 | Topical Area B | B03 Relaxation, Thermalisierung, Transport und Kondensation in hochangeregten Festkörpern
SFB 1073 | Topical Area C | C03 Vom Elektronentransfer zur chemischen Energiespeicherung: ab-initio Untersuchungen korrelierter Prozesse - ISSN
- 2469-9950
- eISSN
- 2469-9969
- ISSN
- 2469-9950; 2469-9969
- Language
- English