Year: 2025
Type: article
Abstract: We report the results of high-resolution dc magnetization and specific-heat measurements at very low temperatures for a single crystal \color{black} of UBe$_{13}$ in magnetic fields applied along the [001] and [111] directions, in both the normal and superconducting states. In the normal state, magnetic susceptibility $χ(T) = M/H$ exhibits a logarithmic temperature dependence over a wide temperature range (1-20 K). However, with increasing field, this non-Fermi-liquid (NFL) behavior of $χ(T) $ at low temperatures is suppressed. Moreover, a susceptibility maximum occurs below 4 T, whereas Fermi-liquid coherence is recovered above 8 T. In addition, thermodynamic anomalies ($T_{\rm A}$ and $H_{\rm A}$) occur in both magnetic susceptibility and specific heat at intermediate fields (6--10 T) along the [111] direction. Furthermore, a nontrivial fifth-order nonlinear susceptibility is observed in the normal-state magnetization of UBe$_{13}$. These results suggest a close relationship between the field-induced multipolar correlations of $5f$-electron degrees of freedom and the Fermi-surface reconstruction accompanying the crossover from the NFL state to the Fermi-liquid state in UBe$_{13}$.
DOI: 10.1103/bxq6-tznr
Authors: Yusei Shimizu, Shunichiro Kittaka, Yohei Kono, Shota Nakamura, Yoshinori Haga, Etsuji Yamamoto, Kazushige Machida, Hiroshi Amitsuka, Toshiro Sakakibara
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: Study of Unconventional Multiple-Superconductivity and Non-Fermi-Liquid State in Uranium Compounds, G2927559168, Theoretical studies of superconducting states with multiple phases in strongly correlated electron materials, G487994878, G5283484592, G5400472189, G5458976115, Novel quantum phenomena probed by multi-dimensional entropy landscape under magnetic field, 非共形空間群及び反転対称の破れた構造をもつ新奇超伝導・量子相の実験的研究, Search for novel topological quantum phases and elucidation of their electronic structures using multiple degrees of freedom in heavy electron systems, G8160056266
OpenAlex ID: W4417268199