Regensburg 2016 – wissenschaftliches Programm
TT 42.10: Vortrag
Mittwoch, 9. März 2016, 12:00–12:15, H18
Exotic spin phases in the one-dimensional spin-1/2 quantum magnet LiCuSbO4 as seen by high-field NMR and ESR spectroscopies — •Margarita Iakovleva1,2,3, Hans-Joachim Grafe1, Evgeniia Vavilova3, Vladislav Kataev1, Alexey Alfonsov1, Hiroyuki Nojiri4, Mihai I. Sturza1, Sabine Wurmehl1, and Bernd Büchner1,2 — 1IFW Dresden, Dresden, Germany — 2TU Dresden, Dresden, Germany — 3Zavoisky Physical Technical Institute, Kazan, Russia — 4Institute of Materials Research, Sendai, Japan
We will present our recent results of high-field NMR and sub-THz ESR studies of the quantum magnet LiCuSbO4 (LCSO) that presents an excellent model system of a one-dimensional spin-1/2 quantum magnet with frustrated exchange interactions. Such networks are predicted to exhibit a plethora of novel ground states beyond classical ferro- or antiferromagnetic phases. In LCSO the absence of a long-range magnetic order down to sub-Kelvin temperatures is suggestive of the realization of a quantum spin liquid state. Our NMR and ESR measurements in strong magnetic fields up to 16 Tesla reveal clear indications for the occurrence of an exotic field-induced hidden phase which we will discuss in terms of multipolar physics.