Regensburg 2016 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 42: Correlated Electrons: Frustrated Magnets - Cu-based Systems & FeCr

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 Iakovleva^1,2,3, Hans-Joachim Grafe¹, Evgeniia Vavilova³, Vladislav Kataev¹, Alexey Alfonsov¹, Hiroyuki Nojiri⁴, Mihai I. Sturza¹, Sabine Wurmehl¹, and Bernd Büchner^1,2 — 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.