Quantum Fluctuation Induced Order in an Anisotropic Pseudospin Model(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

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概要

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• A model describing orbital degrees of freedom of e_g electrons on a cubic lattice is studied at half-filling. The orbital degrees of freedom can be described by pseudospins, and the ground state and the excitation spectrum of the effective Hamiltonian in the strong coupling limit are studied. It is found that a pseudospin ordered state is realized at finite temperatures with the help of the quantum fluctuations, which yield a finite gap in the purely two-dimensional excitation spectrum.

• 社団法人日本物理学会の論文
• 2002-05-15

著者

• Kubo Katsunori

  Institute Of Physics University Of Tsuhiba

関連論文

• Orbital Orderings in Ferromagnetic Metallic Manganites
• Nonanalytic Contribution to the Free Energy of Interacting Two-Kimensional Fermion Systems
• Effects of the Hund's Rule Coupling in an Orbitally Degenerate Anderson Model
• Quantum Fluctuation Induced Order in an Anisotropic Pseudospin Model(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

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