@article{oai:oist.repo.nii.ac.jp:00001803,
 author = {Okuma, Ryutaro and Nakamura, Daisuke and Takeyama, Shojiro},
 issue = {10},
 journal = {Physical Review B},
 month = {Sep},
 note = {To capture the high-field magnetization process of herbertsmithite [ZnCu₃(OH)₆Cl₂], Faraday rotation (FR) measurements were carried out on a single crystal in magnetic fields of up to 190 T. The magnetization data evaluated from the FR angle exhibited a saturation behavior above 150 T at low temperatures, which was attributed to the 1/3 magnetization plateau. The overall behavior of the magnetization process was reproduced by theoretical models based on the nearest-neighbor Heisenberg model. This suggests that herbertsmithite is a proximate kagome antiferromagnet hosting an ideal quantum spin liquid in the ground state. A distinguishing feature is the superlinear magnetization increase, which is in contrast to the Brillouin function-type increase observed by conventional magnetization measurements and indicates a reduced contribution from free spins located at the Zn sites to the FR signal.},
 title = {Magnetization plateau observed by ultrahigh-field Faraday rotation in the kagome antiferromagnet herbertsmithite},
 volume = {102},
 year = {2020}
}