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TT: Fachverband Tiefe Temperaturen

TT 26: Correlated Magnetism – Frustrated Systems

TT 26.7: Vortrag

Dienstag, 10. März 2026, 11:15–11:30, HSZ/0103

Single crystal growth and study of the spin gap system Cu₃WO₆ — •Annarose Jose Palliyan^1,2, Nazmul Islam², Cintli Aguilar-Maldonado², Ralf Feyerherm², Andrey Malyuk³, Sabine Wurmehl³, and Bella Lake^2,1 — ¹Technische Universität Berlin, Germany — ²Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany — ³Leibniz Institute for Solid State and Materials Research Dresden, Germany

Frustration in magnetic materials is an important phenomena leading to exotic quantum states due to the presence of the competing interactions in those materials. From this point of view, cuprates are interesting because of the possibility of having multiple correlations and interactions resulting in unusual correlated phases[1]. Copper tungstate, Cu₃WO₆, is one such compound where Cu²⁺ (S=1/2) occupies the triangular bipyramidal sites. This cubic system (Pa-3) hosts a unique magnetic lattice consisting of coupled hexagons and equilateral triangles of Cu²⁺ giving rise to multiple exchange interactions. In order to study the magnetic behavior and solve the magnetic Hamiltonian of this material, we have grown the first single crystals of Cu₃WO₆ by several different growth techniques and the high crystalline quality of these crystals has been confirmed. We have also studied the thermodynamic properties on these crystals down to low temperatures and our results confirm the reported singlet ground state with a spin gap of about 130K which suggests a dominant hexagonal interaction[2].
[1] Y. Fudamoto et al., Phy. Rev B 65, 174428 (2002)
[2] M. Hase et al., Phys. B: Condens. Matter 215, 325 (1995)

Keywords: Single crystal growth; Cuprates; Spin-gap; Magnetic frustration