Simple Two-Dimensional Model for the Elastic Origin of Cooperativity among Spin States of Spin-Crossover Complexes
arXiv:0706.4135 · doi:10.1103/PhysRevLett.98.247203
Abstract
We study the origin of the cooperative nature of spin crossover (SC) between low spin (LS) and high spin (HS) states from the view point of elastic interactions among molecules. As the size of each molecule changes depending on its spin state, the elastic interaction among the lattice distortions provides the cooperative interaction of the spin states. We develop a simple model of SC with intra and intermolecular potentials which accounts for the elastic interaction including the effect of the inhomogeneity of the spin states, and apply constant temperature molecular dynamics based on the Nosé-Hoover formalism. We demonstrate that, with increase of the strength of the intermolecular interactions, the temperature dependence of the HS component changes from a gradual crossover to a first-order transition.
4 pages, 4 figures
References in corpus (2)
Cited by in corpus (30)
- Realization of the mean-field universality class in spin-crossover materials
- Monte Carlo simulation of pressure-induced phase transitions in spin-crossover materials
- Macroscopic nucleation phenomena in continuum media with long-range interactions
- Intrinsic effects of the boundary condition on switching processes in spin-crossover solids
- Realization of the thermal equilibrium in inhomogeneous magnetic systems by the Landau-Lifshitz-Gilbert equation with stochastic noise, and its dynamical aspects
- Spin-state ice in geometrically frustrated spin-crossover materials
- Effect of the short-range interaction on critical phenomena in elastic interaction systems
- Threshold Phenomena under Photo Excitation of Spin-crossover Materials with Cooperativity due to Elastic Interactions
- Critical temperature and correlation length of an elastic interaction model for spin-crossover materials
- Crossover between a Short-range and a Long-range Ising model
- Consequences of lattice mismatch for phase equilibrium in heterostructured solids
- Equilibrium, Metastability, and Hysteresis in a Model Spin-crossover Material with Nearest-neighbor Antiferromagnetic-like and Long-range Ferromagnetic-like Interactions
- Microscopic modeling of a spin crossover transition
- Termination of the Berezinskii-Kosterlitz-Thouless phase with a new critical universality in spin-crossover systems
- Nontrivial phase diagram for an elastic interaction model of spin crossover materials with antiferromagnetic-like short-range interactions
- Cooperative Phenomena in Spin Crossover Systems
- Three Jahn-Teller states of matter in the spin-crossover system Mn(taa)
- Cation spin and superexchange interaction in oxide materials below and above spin crossover under high pressure
- Photoinduced magnetic bound state in itinerant correlated electron system with spin-state degree of freedom
- Reentrant magnetic ordering and percolation in a spin-crossover system
- Multistability in an unusual phase diagram induced by the competition between antiferromagnetic-like short-range and ferromagnetic-like long-range interactions
- Multiple Coulomb phases with temperature tunable ice rules in pyrochlore spin crossover materials
- Phase diagrams and free-energy landscapes for model spin-crossover materials with antiferromagnetic-like nearest-neighbor and ferromagnetic-like long-range interactions
- Modeling molecular crystals formed by spin-active metal complexes by atom-atom potentials
- Nonadditivity in Quasiequilibrium States of Spin Systems with Lattice Distortion
- Magnetism in spin crossover systems: short-range order and effects beyond the Heisenberg model
- Spin-state smectics in spin crossover materials
- Pressure-induced two-step spin crossover in double-layered elastic model
- Spinodal-assisted nucleation in the two-dimensional state Potts model with short-to-long range interactions
- Quasi-equilibrium nonadditivity