Fig. 2: Nuclear magnetic resonance spectra of YCu3(OH)6.5Br2.5.
From: The observation of quantum fluctuations in a kagome Heisenberg antiferromagnet
a Frequency-sweep spectra measured on the sample S1 at a field μ0H∥ ~ 10.75 T (the reference frequency f0 = 81γnμ0H∥ ~ 123.64 MHz). The shifts of two lines, K1 and K2, are marked by solid and hollow triangles, respectively. Temperature dependence of K1 (b) and K2 (c), with the bulk magnetization (〈Sz〉) measured at μ0H∥ = 10.75 T for comparison. The inset of b shows the ratio between the integrated intensities of 81Br2 and 81Br1 lines (IBr2/IBr1), as well as the stoichiometric ratio from x-ray diffraction44. Inset of c displays K1 and K2 shifts vs bulk susceptibility χ∥ (i.e. M∥/H∥). The red bars display the normalized frequency regions where the intensity is larger than half of the maximum value in b and c, and error bars on IBr2/IBr1 show a standard error from the fit.
