$b$-axis and $c$-axis Knight shift measurements in the superconducting state on ultraclean UTe$_2$ with $T_c$ = 2.1 K
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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866916759218421760 |
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| author | Matsumura, Hiroki Takahashi, Yuki Kinjo, Katsuki Kitagawa, Shunsaku Ishida, Kenji Tokunaga, Yo Sakai, Hironori Kambe, Shinsaku Nakamura, Ai Shimizu, Yusei Homma, Yoshiya Li, Dexin Honda, Fuminori Miyake, Atsushi Aoki, Dai |
| author_facet | Matsumura, Hiroki Takahashi, Yuki Kinjo, Katsuki Kitagawa, Shunsaku Ishida, Kenji Tokunaga, Yo Sakai, Hironori Kambe, Shinsaku Nakamura, Ai Shimizu, Yusei Homma, Yoshiya Li, Dexin Honda, Fuminori Miyake, Atsushi Aoki, Dai |
| contents | Knight shifts along the $b$ and $c$ axes ($K_b$ and $K_c$) at two crystallographically distinct Te sites were measured down to 70 mK using $^{125}$Te nuclear magnetic resonance (NMR) on an ultraclean UTe$_2$ single crystal with a superconducting (SC) transition temperature $T_{\mathrm{c}}$ = 2.1 K. This was carried out to determine the $\boldsymbol{d}$-vector components, which are the order parameter in the spin-triplet pairing. Although the decrease in $K_b$ and $K_c$ is comparable to the theoretical estimation of the SC diamagnetic shielding effect, it is confirmed, by taking the difference between two Knight shifts at the distinct Te sites, that the spin susceptibility along the $b$ and $c$ axes decreases in the SC state. Taking into account the large decrease in $K_a$ in the SC state, we conclude that the $\boldsymbol{d}$ vector has components along all three crystal axes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_19615 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | $b$-axis and $c$-axis Knight shift measurements in the superconducting state on ultraclean UTe$_2$ with $T_c$ = 2.1 K Matsumura, Hiroki Takahashi, Yuki Kinjo, Katsuki Kitagawa, Shunsaku Ishida, Kenji Tokunaga, Yo Sakai, Hironori Kambe, Shinsaku Nakamura, Ai Shimizu, Yusei Homma, Yoshiya Li, Dexin Honda, Fuminori Miyake, Atsushi Aoki, Dai Superconductivity Strongly Correlated Electrons Knight shifts along the $b$ and $c$ axes ($K_b$ and $K_c$) at two crystallographically distinct Te sites were measured down to 70 mK using $^{125}$Te nuclear magnetic resonance (NMR) on an ultraclean UTe$_2$ single crystal with a superconducting (SC) transition temperature $T_{\mathrm{c}}$ = 2.1 K. This was carried out to determine the $\boldsymbol{d}$-vector components, which are the order parameter in the spin-triplet pairing. Although the decrease in $K_b$ and $K_c$ is comparable to the theoretical estimation of the SC diamagnetic shielding effect, it is confirmed, by taking the difference between two Knight shifts at the distinct Te sites, that the spin susceptibility along the $b$ and $c$ axes decreases in the SC state. Taking into account the large decrease in $K_a$ in the SC state, we conclude that the $\boldsymbol{d}$ vector has components along all three crystal axes. |
| title | $b$-axis and $c$-axis Knight shift measurements in the superconducting state on ultraclean UTe$_2$ with $T_c$ = 2.1 K |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2505.19615 |