Origin of mean-field behavior in an elastic Ising model
- Author(s)
- Layne B. Frechette, Christoph Dellago, Phillip L. Geissler
- Abstract
Simple elastic models of spin-crossover compounds are known empirically to exhibit classical critical behavior. We demonstrate how the long-range interactions responsible for this behavior arise naturally upon integrating out mechanical fluctuations of such a model. A mean-field theory applied to the resulting effective Hamiltonian quantitatively accounts for both thermodynamics and kinetics observed in computer simulations, including a barrier to magnetization reversal that grows extensively with system size. For nanocrystals, which break translational symmetry, a straightforward extension of mean-field theory yields similarly accurate results.
- Organisation(s)
- Computational and Soft Matter Physics, Research Platform Erwin Schrödinger International Institute for Mathematics and Physics
- External organisation(s)
- University of California, Berkeley, Erwin Schrödinger Institut
- Journal
- Physical Review B
- Volume
- 102
- No. of pages
- 9
- ISSN
- 2469-9950
- DOI
- https://doi.org/10.1103/PhysRevB.102.024102
- Publication date
- 07-2020
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103015 Condensed matter, 103018 Materials physics
- Keywords
- ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials, Condensed Matter Physics
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/ba0a3952-562d-4a81-b6c2-0f809afa63c5