Magnetization Steps on a Kagome Lattice in Volborthite - Condensed Matter > Strongly Correlated ElectronsReport as inadecuate




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Abstract: Magnetic properties of the spin-1-2 kagome-like compound volborthite arestudied using a high-quality polycrystalline sample. It is evidenced frommagnetization and specific heat measurements that the spins on the kagomelattice still fluctuate at low temperature, down to T = 60 mK that correspondsto 1-1500 of the nearest-neighbor antiferromagnetic interaction, exhibitingneither a conventional long-range order nor a spin gap. In contrast, 51V NMRexperiments revealed a sharp peak at 1 K in relaxation rate, which indicatesthat a certain exotic order occurs. Surprisingly, we have observed three-steps- in magnetization as a function of magnetic field, suggesting that atleast four liquid-like or other quantum states exist under magnetic fields.



Author: Hiroyuki Yoshida, Yoshihiko Okamoto, Takashi Tayama, Toshiro Sakakibara, Masashi Tokunaga, Akira Matsuo, Yasuo Narumi, Koichi Kin

Source: https://arxiv.org/







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