التفاصيل البيبلوغرافية
| العنوان: |
Drastic change in magnetic anisotropy of UTe2 under pressure revealed by 125Te-NMR |
| المؤلفون: |
Kinjo, Katsuki, Fujibayashi, Hiroki, 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: |
Phys. Rev. B 105, L140502 (2022) |
| سنة النشر: |
2022 |
| المجموعة: |
Condensed Matter |
| مصطلحات موضوعية: |
Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons |
| الوصف: |
To investigate the normal-state magnetic properties of UTe2 under pressure, we perform 125Te nuclear magnetic resonance (NMR) measurements up to 2 GPa. Below 1.2 GPa, the b-axis NMR Knight shift shows a broad maximum at the so-called T_chimax on cooling, which is consistent with the magnetization measurement under pressure. T_chimax decreases with increasing pressure and disappears at the critical pressure Pc = 1.7 GPa, above which superconductivity is destroyed. This tendency is also observed in the temperature dependence of the nuclear spin-lattice relaxation rate 1/T1. At low pressures, 1/T1 shows a conventional Fermi-liquid behavior (1/T1T = constant) at low temperatures, indicating the formation of the heavy-fermion state. Above Pc, 1/T1T follows a 1/T behavior without any crossover to the heavy-fermion state down to the lowest temperature (~3 K). In addition, the NMR signals disappear below 3~K, due to the influence of the magnetically ordered moments. From the pressure dependence of the T_chimax and Knight shift, it was found that the Fermi surface character is abruptly changed at Pc, and that superconductivity is observed only in the heavy-fermion state. |
| نوع الوثيقة: |
Working Paper |
| DOI: |
10.1103/PhysRevB.105.L140502 |
| URL الوصول: |
http://arxiv.org/abs/2203.12934 |
| رقم الانضمام: |
edsarx.2203.12934 |
| قاعدة البيانات: |
arXiv |