تقرير
Low-temperature Magnetic Fluctuations Investigated by $^{125}$Te-NMR on the Uranium-based Superconductor UTe$_{2}$
| العنوان: | Low-temperature Magnetic Fluctuations Investigated by $^{125}$Te-NMR on the Uranium-based Superconductor UTe$_{2}$ |
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| المؤلفون: | Fujibayashi, Hiroki, Kinjo, Katsuki, Nakamine, Genki, Kitagawa, Shunsaku, Ishida, Kenji, Tokunaga, Yo, Sakai, Hironori, Kambe, Shinsaku, Nakamura, Ai, Shimizu, Yusei, Homma, Yoshiya, Li, Dexin, Honda, Fuminori, Aoki, Dai |
| المصدر: | J. Phys. Soc. Jpn., Vol.92, No.5, 053702 (2023) |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | To investigate the static and dynamic magnetic properties on the uranium-based superconductor UTe$_{2}$, we measured the NMR Knight shift $K$ and the nuclear spin-lattice relaxation rate $1/T_{1}$ in $H \parallel a$ by $^{125}$Te-NMR on a $^{125}$Te-enriched single-crystal sample. $1/T_1T$ in $H \parallel a$ is much smaller than $1/T_1T$ in $H \parallel b$ and $c$, and magnetic fluctuations along each axis are derived from the $1/T_1T$ measured in $H$ parallel to all three crystalline axes. The magnetic fluctuations are almost identical at two Te sites and isotropic at high temperatures, but become anisotropic below 40 K, where heavy-fermion state is formed. The character of magnetic fluctuations in UTe$_2$ is discussed with the comparison to its static susceptibility and the results on other U-based superconductors. It is considered that the magnetic fluctuations probed with the NMR measurements are determined by the magnetic properties inside the two-leg ladder formed by U atoms, which are dominated by the $q_a$ = 0 ferromagnetic fluctuations. Comment: 10 pages, 6 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.7566/JPSJ.92.053702 |
| URL الوصول: | http://arxiv.org/abs/2305.01218 |
| رقم الأكسشن: | edsarx.2305.01218 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.7566/JPSJ.92.053702 |
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