Regensburg 2019 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 51: Magnetism Poster B
MA 51.70: Poster
Donnerstag, 4. April 2019, 15:00–18:00, Poster C
Competing orders of spin-orbit entangled j=1/2 moments in frustrated fcc magnets — •Dominik Kiese1, Finn Lasse Buessen1, Jan Attig1, Arun Paramekanti2, and Simon Trebst1 — 1Institute for Theoretical Physics, University of Cologne, Germany — 2Department of Physics, University of Toronto, Canada
The interplay of spin-orbit coupling, crystal field effects, and electronic correlations in 4d and 5d materials can give rise to Mott insulators with local spin-orbit entangled j=1/2 moments. Motivated by the recent synthesis of the double perovskite Ba2CeIrO6, we have explored the physics of j=1/2 moments on the fcc lattice subject to both geometric and exchange frustration. Using a pseudo-fermion functional RG approach(pf-FRG), we have identified an extensive phase diagram of competing magnetically ordered and spin liquid states. Exploring thermodynamic signatures such as the Curie-Weiss temperature and magnetic ordering transition, we can not only quantify the amount of frustration in this model system, but can also connect back to a number of experimental measurements of the actual material.