Emergence of Frustrated Short-Range Order above Long-Range Order in the S = 1/2 Kagome Antiferromagnet CaCu₃(OD)₆Cl₂∙0.6D₂O

Negative-chirality order in the S=12 kagome antiferromagnet CdCu3(OH)6Ihara1, Hiyoshi2, M.3 et al. 2022Phys. Rev. BSelf Cite1000View full textAdd to dashboardCite

“…The temperature dependence of the thermal Hall effect observed above the magnetic ordering temperatures was interpreted in the framework of the Schwinger-boson mean field theory [9,11], which suggests a finite-temperature spin liquid state with Dzyaloshinskii-Moriya (DM) interactions. A similar spin liquid behavior was also observed in CaK at corresponding temperature range from the thermal Hall effect and 2 D-nuclear magnetic resonance (NMR) measurements [12,13]. Magnetization studies in pulsed high magnetic fields revealed a series of field-induced valence-bond crystals at multiple magnetization plateaus [10].…”

“…The NVC state was reported in CaK from 35 Cl-and 2 D-NMR studies [12,16]. In CaK, however, the spin directions are not locked to the crystal axes.…”

“…Noncoplanar cuboc structure is also proposed in a restricted area around J d = 0. In the case of CaK, the negative chirality q = 0 structure is stabilized by the energy gain of DM interaction [12,16,17], which underlines the relevance of the latter interaction in establishing a theoretical model for the kagome antiferromagnets.…”