One- and three-dimensional quantum phase transitions and anisotropy in Rb2CuMo3O12
One- and three-dimensional quantum phase transitions and anisotropy in Rb2CuMo3O12
Hayashida, S.; Blosser, D.; Povarov, K. Y.; Yan, Z.; Gvasaliya, S.; Ponomaryov, O.; Zvyagin, S.; Zheludev, A.
Single crystal samples of the frustrated quasi-one-dimensional quantum magnet Rb2Cu2Mo3O12 are investigated by magnetic, thermodynamic, and electron spin resonance (ESR) measurements. Quantum Phase transitions between the gapped, magnetically ordered, and fully saturated phases are observed. Surprisingly, the former has a distinctive three-dimensional character, while the latter is dominated by one-dimensional Quantum spin fluctuations. The entire H-T phase diagram is mapped out and found to be substantially anisotropic. In particular, the lower critical fields differ by over 50% depending on the direction of applied field, while the upper ones are almost isotropic, as is the magnetization above saturation. The ESR spectra are strongly dependent on field orientation and point to a helical structure with a rigidly defined spin rotation plane.
Involved research facilities
- High Magnetic Field Laboratory (HLD)
-
Physical Review B 100(2019), 134427
DOI: 10.1103/PhysRevB.100.134427
Cited 14 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-29933