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Journal Article

Spin Vortex Crystal Order in Organic Triangular Lattice Compound


Gati,  Elena
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Riedl, K., Gati, E., Zielke, D., Hartmann, S., Vyaselev, O. M., Kushch, N. D., et al. (2021). Spin Vortex Crystal Order in Organic Triangular Lattice Compound. Physical Review Letters, 127(14): 147204, pp. 1-7. doi:10.1103/PhysRevLett.127.147204.

Cite as: https://hdl.handle.net/21.11116/0000-0009-B4C4-E
Organic salts represent an ideal experimental playground for studying the interplay between magnetic and charge degrees of freedom, which has culminated in the discovery of several spin-liquid candidates such as kappa-(ET),Cu-2(CN)(3) (kappa-Cu). Recent theoretical studies indicate the possibility of chiral spin liquids stabilized by ring exchange, but the parent states with chiral magnetic order have not been observed in this material family. In this Letter, we discuss the properties of the recently synthesized kappa-(BETS)(2) Mn[N(CN)(2)](3) (kappa-Mn). Based on analysis of specific heat, magnetic torque, and NMR measurements combined with ab initio calculations, we identify a spin-vortex crystal order. These observations definitively confirm the importance of ring exchange in these materials and support the proposed chiral spin-liquid scenario for triangular lattice organics.