Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 17: Poster Session Correlated Electrons 1

TT 17.12: Poster

Montag, 16. März 2020, 15:00–19:00, P2/EG

Magnetic field effects on Kitaev spin liquids — •Christoph Berke, Ciaran Hickey, and Simon Trebst — University of Cologne

Frustrated quantum magnets can give rise to unconventional spin-liquid ground states. Paradigmatic examples are two- and three-dimensional Kitaev systems. The characteristic bond-directional interactions are realized in a number of spin-orbit entangled Mott insulators that, in the presence of magnetic fields, show no indications of long-range order. Here, we study quantum phase transitions in the Kitaev model on different lattices under a magnetic field with an emphasis on the topological nature of Majorana excitations. Our interest is particularly in the emergence of intermediate phases, expected to appear for AFM couplings between the Kitaev spin liquid and the field polarized phase.