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Report No.

Inhomogeneous superconducting state probed by $$^{125}$$Te NMR on UTe$$_2$$

Nakamine, Genki*; Kinjo, Katsuki*; Kitagawa, Shunsaku*; Ishida, Kenji*; Tokunaga, Yo  ; Sakai, Hironori   ; Kambe, Shinsaku  ; Nakamura, Ai*; Shimizu, Yusei*; Homma, Yoshiya*; Li, D.*; Honda, Fuminori*; Aoki, Dai*

UTe$$_2$$ is a recently discovered promising candidate for a spin-triplet superconductor. In contrast to conventional spin-singlet superconductivity, spin-triplet superconductivity possesses spin and angular momentum degrees of freedom. We previously reported that the shoulder signal appears in NMR spectra below the superconducting (SC) transition temperature $$T_c$$ in $$H//b$$, and a slight decrease in the Knight shift along the $$b$$ and $$c$$ axes ($$K_{rm b}$$ and $$K_{rm c}$$, respectively) below $$T_c$$ at a low magnetic field $$H$$. Although the decrease in $$K_{rm c}$$ vanished above 5.5 T, the decrease in $$K_{rm b}$$ was independent of $$H$$ up to 6.5 T. To clarify the origin of the shoulder signal and the trace of the decrease in $$K_{rm b}$$, we compared the $$^{125}$$Te-NMR spectra obtained when $$H//b$$ and $$H//c$$ and measured the $$^{125}$$Te-NMR spectra for $$H//b$$ up to 14.5 T.



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Category:Physics, Multidisciplinary



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