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2003 Volume 20 Issue 5
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SHI Da-Ning(施大宁). 2003: A Modified Mean Field Theory for Spin Systems with Orbital Degeneracy, Chinese Physics Letters, 20(5): 735-737.
Citation: SHI Da-Ning(施大宁). 2003: A Modified Mean Field Theory for Spin Systems with Orbital Degeneracy, Chinese Physics Letters, 20(5): 735-737.
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A Modified Mean Field Theory for Spin Systems with Orbital Degeneracy

  • College of Science,Nanjing University of Aeronautics ,Nanjing 210016

  • Corresponding author: SHI Da-Ning(施大宁)
  • Available Online: 30/05/2003
  • In order to understand the ground state of spin systems with orbital degeneracy, we present a modified mean-field theory that includes four order parameters. Our mean-field results suggest that for a small Hund interaction,the flavour liquid state is still stable against the solid state, but long-range orders may be attained in the system with sufficient deviation from the SU(4) limit. Finally, the implications for the experimental observations on the system LaMnO3 are discussed.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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A Modified Mean Field Theory for Spin Systems with Orbital Degeneracy

    Corresponding author: SHI Da-Ning(施大宁)
  • Available Online: 30/05/2003

Abstract: In order to understand the ground state of spin systems with orbital degeneracy, we present a modified mean-field theory that includes four order parameters. Our mean-field results suggest that for a small Hund interaction,the flavour liquid state is still stable against the solid state, but long-range orders may be attained in the system with sufficient deviation from the SU(4) limit. Finally, the implications for the experimental observations on the system LaMnO3 are discussed.

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