Dresden 2020 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 24: Frustrated Magnets - Spin Liquids 1 (joint session TT/MA)
TT 24.8: Vortrag
Dienstag, 17. März 2020, 11:30–11:45, HSZ 304
Thermal conductivity of the hyper-hyperkagome spin liquid candidate PbCuTe2O6 — •Xiaochen Hong1, Matthias Gillig1, Shravani Chillal2, A. T. M. Nazmul Islam2, Bernd Büchner1,3,4, Bella Lake2,5, and Christian Hess1,4 — 1Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (IFW-Dresden), Dresden — 2Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin — 3Institute of Solid State Physics, TU Dresden, Dresden — 4Center for Transport and Device, TU Dresden, Dresden — 5Technische Universität Berlin, Berlin
Quantum spin liquids (QSLs) are exotic phases of matter formed by interacting quantum spins. QSLs are characterized by the absence of static magnetism and the existence of emergent fractional excitations. Recently, PbCuTe2O6 was discovered to be a rare QSL candidate with a three-dimensional spin structure. Here we report the thermal conductivity measurements of this compound down to about 50 mK and up to 16 T. Our results show evidence for the gapped spinons in PbCuTe2O6. Besides, the unusual field dependence of its low temperature thermal conductivity indicates the residual magnetic order is very sensitive to the external field.