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$$^{33}$$S nuclear magnetic resonance spectra of uranium disulfide $$beta$$-US$$_2$$

Sakai, Hironori   ; Tokunaga, Yo  ; Haga, Yoshinori  ; Kambe, Shinsaku  ; Ramakrishna, S. K.*; Reyes, A. P.*; Rosa, P. F. S.*; Ronning, F.*; Thompson, J. D.*; Fisk, Z.*; Bauer, E. D.*

Uranium disulfide $$beta$$-US$$_2$$ showing a semimetal-to-semiconductor crossover has been investigated by the nuclear magnetic resonance (NMR) technique for $$^{33}$$S nuclei with the nuclear spin of $$I=3/2$$. Since the natural concentration 0.76% of NMR active $$^{33}$$S nuclei is too dilute, the isotopic enrichment to $$sim$$50% has been carried out for the single crystal growth. The $$^{33}$$S NMR spectra have been successfully obtained using a single crystal of $$beta$$-US$$_2$$ with external fields along the crystallographic $$c$$ axis. The S sites assignments have been made based on these NMR spectra.

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