Weyl-Kondo semimetal behavior in the chiral structure phase of Ce3Rh4Sn13
Weyl-Kondo semimetal behavior in the chiral structure phase of Ce3Rh4Sn13
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Ce3Rh4Sn13 手性结构相中的 Weyl-Kondo 半金属行为
DOI：
10.1103/physrevmaterials.7.014201
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发表时间：
2023
影响因子：
3.4
通讯作者：
Yokoyama Makoto
中科院分区：
文献类型：
--
作者：
Iwasa Kazuaki;Suyama Kazuya;Ohira-Kawamura Seiko;Nakajima Kenji;Raymond St?phane;Steffens Paul;Yamada Akira;Matsuda Tatsuma D.;Aoki Yuji;Kawasaki Ikuto;Fujimori Shin-ichi;Yamagami Hiroshi;Yokoyama Makoto
研究了的自旋动力学、晶体电场（CEF）能级结构、比热和X射线光电子能谱（XPS），发现手性晶体中存在反常的半金属输运. CEF的激发观察到约7和39毫电子伏是一致的两个不等价的Ce-离子在手性结构的引用。由于Ce 3+的CEF激发较宽，且Ce 3+共振谱在费米能级处有一个较强的峰，因此Ce 3+的杂化电子对半金属载流子有贡献。此外，与Kramers双重基态的自旋涨落的特点是由位于0.15 meV的峰值。电子态的自旋涨落导致了比热在0.6K以下的行为，这归因于手征晶格对称性下Weyl-Kondo半金属的电子线性色散关系。
The spin dynamics, crystalline-electric-field (CEF) level scheme, specific heat, and x-ray photoemission spectra (XPS) ofwere investigated, which exhibits anomalous semimetal transport in the chiral crystallographic phase. CEF excitations observed at approximately 7 and 39 meV are consistent with the two inequivalent Ce-ion cites in the chiral structure. Because of broader CEF excitations and a strongpeak at the Fermi level in the Ceon-resonance spectrum, the hybridized Ceelectrons contribute to the semimetal carriers. In addition, the spin fluctuation associated with the Kramers doublet ground state is characterized by the peak located at 0.15 meV. The electronic state involving the spin fluctuation causes thebehavior of specific heat below 0.6 K, which is attributed to linear dispersion relations of electrons of the Weyl–Kondo semimetal in the chiral-lattice symmetry.