Broken Symmetry States of Doubly Degenerate Orbital Systems with Cubic Structure : Group Theoretical Classification (Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)

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概要

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• For the eg Hubbard model on a simple cubic lattice group theoretical classification of mean field solutions have been made by assuming four kinds of single-Q wave vectors (0,0,0), (0,0,π), (π,π,0) and (π,π,π), and collinear magnetic states. Twenty-one broken symmetry states have been obtained in detail. Besides the usual charge and spin ordering states the so-called orbital orders of the two e_g states, φ_1 (3z^2-r^2)/√<3> and φ_2=x^2-y^2, or their linear combinations have been derived. It is shown that the broken symmetry states corresponding to ordering of the complex orbital states Ψ_1=1/√<2>(φ_1-iφ_2) and Ψ_2=1/√<2>(φ_1+iφ_2) represent octupole ordering. Finally quite exotic broken symmetry states consisting of combination of charge, spin and orbital orderings are derived.

• 社団法人日本物理学会の論文
• 2003-10-15

著者

• Suzuki N

  Division Of Materials Physics Department Of Physical Science Graduate School Of Engineering Science

• Suzuki Naoshi

  Division Of Material Physics Department Of Physical Science Graduate School Of Engineering Science O

• MASAGO Akira

  Division of Materials Physics, Department of Physical Science, Graduate School of Engineering Scienc

• Masago A

  Osaka Univ. Osaka

• Masago Akira

  Division Of Materials Physics Department Of Physical Science Graduate School Of Engineering Science Osaka University

関連論文

• Dynamical Structure Factor of S=1/2 AF-F Alternating Chains
• Pair Dynamical Correlated-Effective-Field Approximation
• Broken Symmetry States of Doubly Degenerate Orbital Systems with Cubic Structure : Group Theoretical Classification (Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)
• Broken Symmetry States of Doubly Degenerate Orbital Systems with Cubic Structure-Group Theoretical Classification

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