Regensburg 2016 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 59: Low-Dimensional Systems: Poster Session
TT 59.4: Poster
Mittwoch, 9. März 2016, 15:00–18:30, Poster D
Electron correlations in a one-dimensional manganite model — •Ole Schumann1, Salvatore R. Manmana1, Peter E. Blöchl2, Fabian Biebl1, and Sangeeta Rajpurohit2 — 1Institute for Theoretical Physics, Georg-August-University Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen — 2Institute for Theoretical Physics, TU Clausthal, Leibnizstr. 10, 38678 Clausthal-Zellerfeld
An effective 1D model for a manganite is derived for the ground state atomic structure which consists of antiferromagnetically coupled manganese dimers in the spin triplet state. The model is Hubbard like with an additional staggered magnetic field. Using the DMRG, we obtain the T=0 phase diagram of the resulting many electron model. We investigate various scenarios for photo-excitation of the system and give an outlook to a more realistic modelling.
Financial support via DFG through CRC 1073 “Atomic scale control of energy conversion”, project B03 is gratefully acknowledged.