QUANTUM FLUCTUATIONS IN THE AXIAL NEXT-NEAREST-NEIGHBOR ISING-MODEL
We obtain the axial next-nearest-neighbor Ising model from a Heisenberg model with large single-ion anisotropy energy, D, as might be relevant for helical spin systems. We treat quantum fluctuations to lowest order in 1/S at zero temperature within an expansion in J/D, where J is an exchange energy....
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
1995
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