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arXiv 2302.02010cond-mat.str-el
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O边共振非弹性X射线散射识别UTe2的f电子对称性

Identifying f-electron symmetries of UTe2 with O-edge resonant inelastic X-ray scattering

Shouzheng Liu, Yishuai Xu, Erica C. Kotta, Lin Miao, Sheng Ran, Johnpierre Paglione, Nicholas P. Butch, Jonathan D. Denlinger, Yi-De Chuang, L. Andrew Wray

摘要:

最近在UTe $_2$中发现了非磁性母态的自旋三重态超导电性,激发了人们对Cooper配对机制的极大兴趣。短程电磁关联的实验表征对于理解这些现象至关重要。在这里,我们使用共振非弹性X射线散射(RIXS),X射线吸收光谱(XAS),和原子多重态为基础的建模,以阐明5 $f^2$ 6 $d^1$为基础的模型与单重态晶体场状态与5 $f^3$为基础的模型,预测原子Kramers双峰和更大的5 $f$巡回之间的积极辩论。的XAS和RIXS数据被发现同意强烈与预测5 $f^2$ 6 $d^1$类价电子配置与弱内二聚体磁关联,并提供新的背景解释最近的调查电子结构和超导配对机制。

英文摘要:

The recent discovery of spin-triplet superconductivity emerging from a non-magnetic parent state in UTe$_2$ has stimulated great interest in the underlying mechanism of Cooper pairing. Experimental characterization of short-range electronic and magnetic correlations is vital to understanding these phenomena. Here we use resonant inelastic X-ray scattering (RIXS), X-ray absorption spectroscopy (XAS), and atomic multiplet-based modeling to shed light on the active debate between 5$f^2$6$d^1$-based models with singlet crystal field states versus 5$f^3$-based models that predict atomic Kramers doublets and much greater 5$f$ itinerancy. The XAS and RIXS data are found to agree strongly with predictions for an 5$f^2$6$d^1$-like valence electron configuration with weak intra-dimer magnetic correlations, and provide new context for interpreting recent investigations of the electronic structure and superconducting pairing mechanism.

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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