Anisotropic response of spin susceptibility in the superconducting state of UTe2 probed with Te 125 -NMR measurement

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

研究成果: Contribution to journalArticle査読

4 被引用数 (Scopus)

抄録

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.

本文言語英語
論文番号L100503
ジャーナルPhysical Review B
103
10
DOI
出版ステータス出版済み - 3 17 2021
外部発表はい

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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