Rb2Cu2Mo3O12
Growing single cystals of copper molybdenum oxides is extremly challenging, and growing them large is seemingly impossible. Nonetheless, some single crystal specimen were successfully synthesized in our group.
A complicated structure of copper molybdenum oxides gives rise to the very complex spin chains inside them. Inerestingly, while the Rb material is gapped and seems to have just a single filed-induced phase, the Cs counterpart orders already at zero field and has an extraodinarily complex phase diagram. Many of these phases could actually be multiferroic in their character.
S. Hayashida, D. Blosser, K. Yu. Povarov, Z. Yan, S. Gvasaliya, A. N. Ponomaryov, S. A. Zvyagin, and A. Zheludev, One- and three-dimensional quantum phase transitions and anisotropy in Rb2Cu2Mo3O12, external pagePhys. Rev. B 100, 134427 (2019), external pagearxiv:1908.07739
D. Flavián, S. Hayashida, L. Huberich, D. Blosser, K. Yu. Povarov, Z. Yan, S. Gvasaliya, A. Zheludev, Magnetic phase diagram of the linear quantum ferro-antiferromagnet Cs2Cu2Mo3O12 , external pagearXiv:2004.10636, external pagePhys. Rev. B 101, 224408