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Revealing the intrinsic electronic structure and complex fermiology of YRu2Si2 using angle-resolved photoemission spectroscopy
Physical Review B ( IF 3.2 ) Pub Date : 2024-09-03 , DOI: 10.1103/physrevb.110.125104
Anup Pradhan Sakhya 1 , Sabin Regmi 1 , Milo Sprague 1 , Mazharul Islam Mondal 1 , Iftakhar Bin Elius 1 , Nathan Valadez 1 , Andrzej Ptok 2 , Dariusz Kaczorowski 2 , Madhab Neupane 1
Affiliation  

We performed a detailed study of the intrinsic electronic structure of YRu2Si2 employing angle-resolved photoemission spectroscopy (ARPES) and density-functional theory (DFT) based first-principles calculations. Electrical and magnetic measurements were conducted on well-oriented high-quality single crystals. Bulk physical measurements indicate that the compound exhibits slightly enhanced Pauli paramagnetic behavior, accompanied by electrical transport properties reminiscent of metals. Our ARPES data reveal fourfold symmetric Fermi surface with weakly dispersing bands around the N¯ point originating from Ru d orbitals. We observed the anisotropic characteristics of the band near the N¯ point, showing weak dispersion in the X¯N¯X¯ direction and minimal dispersion along the N¯Γ¯N¯ direction. The electronic band structure near the Fermi level is primarily governed by the Ru d orbital, with minor contributions from the Y d and Si p orbitals. Polarization-dependent ARPES results indicate the multiband and multiorbital band character of YRu2Si2. Due to the negligible correlation effect, the observed ARPES data are found to be in good agreement with the DFT results.

中文翻译:


使用角分辨光电子能谱揭示 YRu2Si2 的固有电子结构和复杂的费米学



我们 p 埃弗梅 d 一个 d 埃塔莱 d 固有电子结构的研究 YRu2Si2 采用基于第一原理计算的角分辨光电子能谱(ARPES)和密度泛函理论(DFT)。在定向良好的高质量单晶上进行电学和磁学测量。大量物理测量表明,该化合物表现出略微增强的泡利顺磁行为,并伴有让人想起金属的电传输特性。我们的 ARPES 数据揭示了四重对称费米表面,其周围有弱色散带 N¯ 源自 Ru d 轨道的点。我们观察到了附近能带的各向异性特征 N¯ 点,显示出弱分散 X¯N¯X¯ 方向和沿方向的最小分散 N¯Γ¯N¯ 方向。费米能级附近的电子能带结构主要由 Ru d 轨道控制,Y d 和 Si p 轨道的贡献较小。偏振相关的 ARPES 结果表明了 YRu2Si2 。由于相关效应可以忽略不计,观察到的 ARPES 数据与 DFT 结果非常吻合。
更新日期:2024-09-03
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