TY - JOUR
T1 - Anisotropic response of spin susceptibility in the superconducting state of UTe2 probed with Te 125 -NMR measurement
AU - Nakamine, Genki
AU - Kinjo, Katsuki
AU - Kitagawa, Shunsaku
AU - Ishida, Kenji
AU - Tokunaga, Yo
AU - Sakai, Hironori
AU - Kambe, Shinsaku
AU - Nakamura, Ai
AU - Shimizu, Yusei
AU - Homma, Yoshiya
AU - Li, Dexin
AU - Honda, Fuminori
AU - Aoki, Dai
N1 - Funding Information:
We would like to thank M. Manago, J. Ishizuka, Y. Yanase, Y. Maeno, S. Yonezawa, and J-P. Brison, G. Knebel, and J. Flouquet for valuable discussions. This work was supported by the Kyoto University LTM Center, Grants-in-Aid for Scientific Research (Grants No. JP15H05745, No. JP17K14339, No. JP19K03726, No. JP16KK0106, No. JP19K14657, No. JP19H04696, No. JP19H00646, and No. JP20H00130) and Grant-in-Aid for JSPS Research Fellow (Grant No. JP20J11939) from JSPS.
Publisher Copyright:
©2021 American Physical Society.
PY - 2021/3/17
Y1 - 2021/3/17
N2 - To investigate spin susceptibility in a superconducting (SC) state, we measured the Te125-NMR Knight shifts at magnetic fields (H) up to 6.5 T along the b and c axes of single-crystal UTe2, a promising candidate for a spin-triplet superconductor. In the SC state, the Knight shifts along the b and c axes (Kb and Kc, respectively) decreased slightly, and the decrease in Kb was almost constant up to 6.5 T. The reduction in Kc decreased with increasing H, and Kc was unchanged through the SC transition temperature at 5.5 T, excluding the possibility of spin-singlet pairing. Our results indicate that spin susceptibilities along the b and c axes slightly decrease in the SC state in low H, and the H response of SC spin susceptibility is anisotropic on the bc plane. We discuss the possible d-vector state within the spin-triplet scenario and suggest that the dominant d-vector component for the case of Hb changes above 13 T, where Tc increases with increasing H.
AB - To investigate spin susceptibility in a superconducting (SC) state, we measured the Te125-NMR Knight shifts at magnetic fields (H) up to 6.5 T along the b and c axes of single-crystal UTe2, a promising candidate for a spin-triplet superconductor. In the SC state, the Knight shifts along the b and c axes (Kb and Kc, respectively) decreased slightly, and the decrease in Kb was almost constant up to 6.5 T. The reduction in Kc decreased with increasing H, and Kc was unchanged through the SC transition temperature at 5.5 T, excluding the possibility of spin-singlet pairing. Our results indicate that spin susceptibilities along the b and c axes slightly decrease in the SC state in low H, and the H response of SC spin susceptibility is anisotropic on the bc plane. We discuss the possible d-vector state within the spin-triplet scenario and suggest that the dominant d-vector component for the case of Hb changes above 13 T, where Tc increases with increasing H.
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U2 - 10.1103/PhysRevB.103.L100503
DO - 10.1103/PhysRevB.103.L100503
M3 - Article
AN - SCOPUS:85104254312
SN - 2469-9950
VL - 103
JO - Physical Review B
JF - Physical Review B
IS - 10
M1 - L100503
ER -