Antiferro-Hexadecapole Scenario for Metal-Insulator Transition in PrRu_4P_<12> (Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)

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概要

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• A theory of metal-insulator transition in PrRu_4P_<12> is developed from a microscopic point of view, based on j-j coupling scheme. For the metal-insulator transition, we propose antiferro-hexadecapole order without breaking local symmetry. It is shown that the hexadecapole ordered state appears in the case that the ground state of Pr-ion is Γ_1 singlet, and conduction electrons dominantly belong to Γ_5 in T_h point group. For half-filled conduction band, system becomes insulator in the ordered state due to gap formed by the antiferro-hexadecapole moment. The present scenario provides reasonable explanation for experimental results of PrRu_4P_<12>.

• 社団法人日本物理学会の論文
• 2006-03-15

著者

• Takimoto Tetsuya

  Department Of Physics Faculty Of Science And Technology Science University Of Tokyo

• TAKIMOTO Tetsuya

  Department of Physics, Kobe University

関連論文

• Theory of Spin Fluctuation-Induced Superconductivity Based on a d-p Model
• Anomalous Properties around Magnetic Instability in Heavy Electron Systems
• Antiferro-Hexadecapole Scenario for Metal-Insulator Transition in PrRu_4P_ (Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)

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