Temperature-Dependent Single-Ion Excitations in Anisotropic Paramagnets
- 19 February 1979
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 42 (8) , 533-536
- https://doi.org/10.1103/physrevlett.42.533
Abstract
By an exact calculation for an Ising chain it is established that single-ion (electronic) energy levels are temperature dependent in anisotropic paramagnets. The effect is produced by developing anisotropic spin-spin correlations and, in a more general context, is investigated using the correlated-effective-field statistical approximation. It should be directly observable by spectroscopic means in strongly anisotropic paramagnetic systems.Keywords
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