arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1908.09418cond-mat.str-el
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光电子能谱学研究UTe $_2$的电子结构

Electronic Structure of UTe$_2$ Studied by Photoelectron Spectroscopy

Shin-ichi Fujimori, Ikuto Kawasaki, Yukiharu Takeda, Hiroshi Yamagami, Ai Nakamura, Yoshiya Homma, Dai Aoki

摘要:

利用软X射线同步辐射共振光电子能谱学(RPES)和角分辨光电子能谱学(ARPES)研究了非常规超导体UTe $_2$的电子结构。用$5f$ RPES对UTe $_2$的部分$\mathrm{U}~5f$态密度进行了成像,发现$\mathrm{U}~5f$态具有巡游特性,但由于电子关联效应的影响,存在一个非相干峰.此外,在较高的结合能下观察到$\mathrm{U}~5f$态到$\mathrm{Te}~5p$能带中的异常混合,这不能用能带结构计算来解释。另一方面,通过ARPES计算得到了UTe $_2$的能带结构,并通过能带结构计算解释了其整体能带结构。这些结果表明,UTe $_2$的$\mathrm{U}~5f$态具有巡游但强相关的性质,与$\mathrm{Te}~5p$态的增强的杂化。

英文摘要:

The electronic structure of the unconventional superconductor UTe$_2$ was studied by resonant photoelectron spectroscopy (RPES) and angle-resolved photoelectron spectroscopy (ARPES) with soft X-ray synchrotron radiation. The partial $\mathrm{U}~5f$ density of states of UTe$_2$ were imaged by the $\mathrm{U}~4d$--$5f$ RPES and it was found that the $\mathrm{U}~5f$ state has an itinerant character, but there exists an incoherent peak due to the strong electron correlation effects. Furthermore, an anomalous admixture of the $\mathrm{U}~5f$ states into the $\mathrm{Te}~5p$ bands was observed at a higher binding energy, which cannot be explained by band structure calculations. On the other hand, the band structure of UTe$_2$ was obtained by ARPES and its overall band structure were mostly explained by band structure calculations. These results suggest that the $\mathrm{U}~5f$ states of UTe$_2$ have itinerant but strongly-correlated nature with enhanced hybridization with the $\mathrm{Te}~5p$ states.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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