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arXiv 1504.06248cond-mat.str-el
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立方YbB12基态γ_8对称性的芯能级光电子发射线性二向色性证据

Evidence for Gamma_8 Ground-State Symmetry of Cubic YbB12 Probed by Linear Dichroism in Core-Level Photoemission

Yuina Kanai, Takeo Mori, Sho Naimen, Kohei Yamagami, Hidenori Fujiwara, Atsushi Higashiya, Toshiharu Kadono, Shin Imada, Takayuki Kiss, Arata Tanaka, Kenji Tama… 展开作者

Yuina Kanai, Takeo Mori, Sho Naimen, Kohei Yamagami, Hidenori Fujiwara, Atsushi Higashiya, Toshiharu Kadono, Shin Imada, Takayuki Kiss, Arata Tanaka, Kenji Tamasaku, Makina Yabashi, Tetsuya Ishikawa, Fumitoshi Iga, Akira Sekiyama

摘要:

我们成功地观察到立方对称YbB_(12)的角分辨Yb ~(3+)3d ~(5/2)芯能级光电子谱的线性二色性。其各向异性的4f电荷分布,由于晶体场分裂是负责的线性二色性,这已被验证的光谱模拟使用离子计算与完整的多重态理论的单网站Yb 3+离子在立方对称。通过对YbB_(12)的γ_8基态的理论分析,定量地再现了YbB_(12)的线性二向色性和两个不同光电子方向的偏振相关光谱,表明Yb ~(3+)与Yb ~(2+)混合态具有γ_8基态对称性.

英文摘要:

We have successfully observed linear dichroism in angle-resolved Yb3+ 3d5/2 core-level photoemission spectra for YbB12 in cubic symmetry. Its anisotropic 4f charge distribution due to the crystal-field splitting is responsible for the linear dichroism, which has been verified by spectral simulations using ionic calculations with the full multiplet theory for a single-site Yb3+ ion in cubic symmetry. The observed linear dichroism as well as the polarization-dependent spectra in two different photoelectron directions for YbB12 are quantitatively reproduced by theoretical analysis for the Gamma_8 ground state, indicating the Gamma_8 ground-state symmetry for the Yb3+ ions mixed with the Yb2+ state.

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