Slow Electronic Dynamics in the Paramagnetic State of UTe2

被引:27
作者
Tokunaga, Yo [1 ]
Sakai, Hironori [1 ]
Kambe, Shinsaku [1 ]
Haga, Yoshinori [1 ]
Tokiwa, Yoshifumi [1 ]
Opletal, Petr [1 ]
Fujibayashi, Hiroki [2 ]
Kinjo, Katsuki [2 ]
Kitagawa, Shunsaku [2 ]
Ishida, Kenji [2 ]
Nakamura, Ai [3 ]
Shimizu, Yusei [3 ]
Homma, Yoshiya [3 ]
Li, Dexin [3 ]
Honda, Fuminori [3 ,4 ]
Aoki, Dai [3 ,5 ]
机构
[1] Japan Atom Energy Agcy, ASRC, Tokai, Ibaraki 3191195, Japan
[2] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan
[3] Tohoku Univ, IMR, Oarai, Ibaraki 3111313, Japan
[4] Kyushu Univ, Cent Inst Radioisotope Sci & Safety, Fukuoka 8190395, Japan
[5] Univ Grenoble Alpes, IRIG PHELIQS, CEA, F-38000 Grenoble, France
关键词
NMR; ORDER;
D O I
10.7566/JPSJ.91.023707
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Te-125 NMR experiments in field (H) applied along the easy magnetization axis (the a-axis) revealed slow electronic dynamics developing in the paramagnetic state of UTe2. The observed slow fluctuations are concerned with a successive growth of long-range electronic correlations below 30-40K, where the spin susceptibility along the hard magnetization axis (the b-axis) shows a broad maximum. The experiments also imply that tiny amounts of disorder or defects locally disturb the long-range electronic correlations and develop an inhomogeneous electronic state at low temperatures, leading to a low temperature upturn observed in the bulk-susceptibility in H parallel to a. We suggest that UTe2 would be located on the paramagnetic side near an electronic phase boundary, where either magnetic or Fermi-surface instability would be the origin of the characteristic fluctuations.
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页数:5
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