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In statistical mechanics, the two-dimensional square lattice Ising model is a simple lattice model of interacting magnetic spins. The model is notable for having nontrivial interactions, yet having an analytical solution. The model was solved by Lars Onsager for the special case that the external magnetic field H = 0.[1] An analytical solution for the general case for has yet to be found.
^Onsager, Lars (1944-02-01). "Crystal Statistics. I. A Two-Dimensional Model with an Order-Disorder Transition". Physical Review. 65 (3–4): 117–149. doi:10.1103/PhysRev.65.117.
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mechanics, the two-dimensional squarelatticeIsingmodel is a simple latticemodel of interacting magnetic spins. The model is notable for having nontrivial...
phases. The model allows the identification of phase transitions as a simplified model of reality. The two-dimensional square-latticeIsingmodel is one of...
the Potts model, a generalization of the Isingmodel, is a model of interacting spins on a crystalline lattice. By studying the Potts model, one may gain...
simplest models that shows a phase transition. Lars Onsager famously calculated exactly the free energy of an infinite-sized square-latticeIsingmodel at zero...
ZN{\displaystyle Z_{N}} model (also known as the clock model) is a simplified statistical mechanical spin model. It is a generalization of the Isingmodel. Although...
found for a few toy models. Some examples include the Bethe ansatz, square-latticeIsingmodel in zero field, hard hexagon model. Although some problems...
quantum mechanically. It is related to the prototypical Isingmodel, where at each site of a lattice, a spin σ i ∈ { ± 1 } {\displaystyle \sigma _{i}\in \{\pm...
in physical materials as other lattices, it can still provide useful insight. The Isingmodel is a mathematical model of ferromagnetism, in which the...
1D Isingmodel, which is already solved by Ising himself. He then computed the transfer matrix of the "Ising ladder", meaning two 1D Isingmodels side-by-side...
XY model (sometimes also called classical rotor (rotator) model or O(2) model) is a latticemodel of statistical mechanics. In general, the XY model can...
frequently employed to study latticemodels, including the Hubbard model, Isingmodel, Heisenberg model, t-J model, and SYK model. After determining the eigenstates...
etc. the random cluster model is a random graph that generalizes and unifies the Isingmodel, Potts model, and percolation model. It is used to study random...
(percolation) first occurs. The most common percolation model is to take a regular lattice, like a squarelattice, and make it into a random network by randomly...
dimensions or when exact solutions are known such as the two-dimensional Isingmodel. The theoretical treatment in generic dimensions requires the renormalization...
The spherical model is a model of ferromagnetism similar to the Isingmodel, which was solved in 1952 by T. H. Berlin and M. Kac. It has the remarkable...
Isingmodel. In this model, we have spins arranged on a d {\displaystyle d} -dimensional lattice with only nearest neighbor interactions. This model can...
theory via the Isingmodel. The Kramers–Wannier duality yields the exact location of the critical point for the Isingmodel on the squarelattice. Wannier received...
the Fortuin–Kasteleyn random cluster model, which has many connections with the Isingmodel and other Potts models. Bernoulli (bond) percolation on complete...
atom or particle). This contrasts with a nearest-neighbour model, such as the Isingmodel, in which the energy, and thus the Boltzmann weight of a statistical...
form of Eq. (14) corresponds identically to the Isingmodel of ferromagnetism except that in the Isingmodel, the dot product of the two spin angular momenta...
studied even before. Early work includes a study of the Isingmodel on a triangular lattice with nearest-neighbor spins coupled antiferromagnetically...
statistical latticemodels 8-vertex model Gaudin modelIsingmodel in 1- and 2-dimensions Ice-type model of Lieb Quantum Heisenberg model Hitchin system...
fully-frustrated Isingmodel on a two-dimensional periodic lattice. To see that, we note that at the ground state, each plaquette of the spin model must contain...
treats the vibrations of the atomic lattice (heat) as phonons in a box in contrast to the Einstein photoelectron model, which treats the solid as many individual...
the Isingmodellattice. So this anomalous dimension in the conformal field theory is the same as a particular critical exponent of the Isingmodel phase...
Toulouse, G. (1977). "Theory of the frustration effect. II. Ising spins on a squarelattice". Journal of Physics C: Solid State Physics. 10 (18): 537....