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Polarization dependence of soft X-ray absorption spectroscopy on the heavy fermion superconductor CeNi$$_{2}$$Ge$$_{2}$$

Fujiwara, Hidenori*; Nakatani, Yasuhiro*; Aratani, Hidekazu*; Kanai-Nakata, Yuina*; Yamagami, Kohei*; Hamamoto, Satoru*; Kiss, Takayuki*; Sekiyama, Akira*; Tanaka, Arata*; Ebihara, Takao*; Saito, Yuji  

We have performed soft X-ray absorption spectroscopy (XAS) on the heavy fermion superconductor CeNi$$_{2}$$Ge$$_{2}$$ to examine the local 4${it f}$ electronic structure. The XAS spectra are qualitatively explained by ionic calculations, indicating a degree of localized character of the 4${it f}$ states, while sizable ${it cf}$-hybridization effects are also observed in the XAS spectra and those magnetic circular dichroism. In addition, the temperature dependence of linear dichroism in the XAS spectra indicates that the ground state symmetry is $$Gamma$$$$_{7}$$, and the excited states with $$Gamma$$$$_{6}$$ symmetry is above 390 K.

Language

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English

Journal

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New Physics; Sae Mulli

Volume

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73

Number

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12

Pages

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p.1062 - 1066

Publication Year/Month

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2023/12

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Held date

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Patent information

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Paper URL

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https://doi.org/10.3938/NPSM.73.1062

DOI for research data

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Keywords

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軟X線吸収分光; 重い電子系超伝導化合物; CeNi$$_{2}$$Ge$$_{2}$$

Research Facility

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SPring-8(大型放射光施設)

Press Release

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Article of JAEA R&D Review

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Cooperating Institute

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大阪大学

Accesses

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- Accesses

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