Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 19: Poster Session: Correlated Electrons 1
TT 19.46: Poster
Montag, 20. März 2017, 15:00–19:00, P2-EG
Fermi surfaces of B20 compounds from Density Functional Theory and de Haas-van Alphen effect — Schorsch Michael Sauther2, •Arthur Niedermayr1, Matthias Dodenhöft4, Andreas Bauer1, Frank Freimuth3, Bernd Zimmermann3, Yuriy Mokrousov3, Dirk Grundler5, Christian Pfleiderer1, and Marc Andreas Wilde1 — 1Phys.-Dep. E51, TU München — 2Phys.-Dep. E10, TU München — 3Peter Grünberg Institute, Jülich — 4Phys.-Dep. E21, TU München — 5LMGN, Lausanne
The class of chiral intermetallic compounds with cubic B20 crystal structure have attracted a lot of interest. Manganese silicide (MnSi) is a metal known for its unusual magnetic properties including a skyrmion lattice phase as well as for its strong electronic correlations and non-Fermi liquid behavior under pressure. The isostructural iron silicide (FeSi), on the other hand is commonly assumed to be a strongly correlated small-gap semiconductor at low temperature. However, the nature of the insulating state and the role of the crystal surface are not yet fully settled. We combine density functional theory (DFT) calculations and the de Haas-van Alphen (dHvA) effect in order to investigate the electronic properties of B20 compounds. First results indicate a substantial role of spin-orbit coupling for the Fermi surface properties of MnSi.