Orientational order in: Antiferromagnetic Ising model for the fcc lattice
- 28 June 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 70 (26), 4142-4145
- https://doi.org/10.1103/physrevlett.70.4142
Abstract
By analysis of the electronic contribution to the binding in , we show that the problem of orientational ordering can be mapped onto the fcc nearest-neighbor antiferromagnetic Ising model with J at the order of 100 K. For T<1.76J, the system should be found in a state which is antiferromagnetically ordered in two dimensions and disordered in the third. This is not inconsistent with present x-ray powder data. We find that the low-temperature conduction-band structure closely resembles that of the simplest antiferromagnetically ordered (so-called bidirectional) crystal.
Keywords
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