Charge Transfer Effect under Odd-Parity Crystalline Electric Field

• 渡辺, 真仁

• Miyake, Kazumasa

抄録

Charge-transfer effect under odd-parity crystalline electric field (CEF) is analyzed theoretically. In the quantum-critical metal β-YbAlB4, seven-fold configuration of B atoms surrounding the Yb atom breaks local inversion symmetry at the Yb site, giving rise to the odd-parity CEF. Analysis of the CEF on the basis of the hybridization picture shows that admixture of 4f and 5d wave functions at Yb with pure imaginary coefficient occurs, which makes magnetic-toroidal (MT) and electric-dipole (ED) degrees of freedom active. By constructing the minimal model for the periodic crystal β-YbAlB4, we show that the MT as well as ED fluctuation is divergently enhanced at the quantum critical point of the valence transition simultaneously with critical valence fluctuations.

J-Physics 2019 International Conference & KINKEN-WAKATE 2019 Multipole Physics, September 17-21, 2019, Kobe University, Hyogo, Japan

Journal Article

収録刊行物

• Proceedings of J-Physics 2019: International Conference on Multipole Physics and Related Phenomena

  Proceedings of J-Physics 2019: International Conference on Multipole Physics and Related Phenomena 29 014001-1-014001-10, 2020-02-13

  日本物理学会

キーワード

• charge transfer
• odd parity CEF
• magnetic toroidal fluctuation
• electric dipole fluctuation
• valence QCP
• β-YbAlB4
• α-YbAl1-xFexB4

詳細情報

• CRID: 1050002213763560448
• NII論文ID: 120006822477
• ISSN: 24353892
• DOI: 10.7566/jpscp.29.014001
• HANDLE: 10228/00007689
• Web Site: https://kyutech.repo.nii.ac.jp/records/6479
• Web Site: https://journals.jps.jp/doi/pdf/10.7566/JPSCP.29.014001
• 本文言語コード: en
• 資料種別: journal article
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