125Te 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 30−40 K, 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∥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.
@article{arxiv.2201.07455,
title = {Slow Electronic Dynamics in the Paramagnetic State of UTe$_2$},
author = {Yo Tokunaga and Hironori Sakai and Shinsaku Kambe and Yoshinori Haga and Yoshifumi Tokiwa and Petr Opletal and Hiroki Fujibayashi and Katsuki Kinjo and Shunsaku Kitagawa and Kenji Ishida and Ai Nakamura and Yusei Shimizu and Yoshiya Homma and Dexin Li and Fuminori Honda and Dai Aoki},
journal= {arXiv preprint arXiv:2201.07455},
year = {2022}
}
Comments
5 pages, 5 figures, accepted for publication in J. Phys. Soc. Jpn