Regensburg 2019 – scientific programme
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MA: Fachverband Magnetismus
MA 15: Magnetism Poster A
MA 15.64: Poster
Tuesday, April 2, 2019, 10:00–13:00, Poster E
Quantum entanglement of charge and spin in frustrated κ-(BEDT-TTF)2Hg(SCN)2Br — •Mamoun Hemmida1,2, Hans-Albrecht Krug von Nidda2, Björn Miksch1, Leonid Samoilenko1, Andrej Pustogow1, Sebastian Widmann2, Alois Loidl2, and Martin Dressel1 — 11. Phys. Inst., Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany — 2EP V, EKM, Universität Augsburg, 86135 Augsburg, Germany
Detailed static and dynamic spin susceptibilities as well as transport investigations [1] of the two-dimensional frustrated organic metal κ-(BEDT-TTF)2Hg(SCN)2Br exhibit unusual properties below the metal-insulator transition temperature of 90 K of both charge and spin degrees of freedom. Such properties like weak ferromagnetism and glassy state seem to result from the dominant role of quantum fluctuations associated with frustration and disorder at low temperatures. Based on the experimental observations, a strong entanglement between spin and charge degrees of freedom has been suggested in Ref. 2. We gratefully acknowledge sample preparation and structural characterization by A. Henderson, T. Siegrist and J. A. Schlueter.
[1] T. Ivek et al., Phys. Rev. B 96, 085116 (2017).
[2] M. Hemmida et al., arXiv:1710.04028 (2017).