REVIEWS OF TOPICAL PROBLEMS: Magnetic order and spin fluctuations in low-dimensional insulating systems
Abstract
The current theoretical and experimental situations are reviewed for low-dimensional insulating systems with a low magnetic transition temperature TM and pronounced short-range magnetic order above this temperature. Both the standard and self-consistent spin-wave theories are shown to be insufficient to quantitatively describe the experimental data on these systems. Field-theoretical approaches taking into account the contribution of the spin-fluctuation excitations (neglected in the spin-wave theories) to the thermodynamic properties of ferro- and antiferromagnets are discussed.
- Publication:
-
Physics Uspekhi
- Pub Date:
- June 2007
- DOI:
- 10.1070/PU2007v050n06ABEH006313
- arXiv:
- arXiv:2102.08130
- Bibcode:
- 2007PhyU...50..613K
- Keywords:
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- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- In Russian, 59 p. Book Chapter in: Physics of Magnetic Materials and Nanostructures (Ekaterinburg, 2020), p.456. Extended and updated version of the paper Physics-Uspekhi 50, 613 (2007)