sw_model

Syntax

obj = sw_model(model, param)

Description

obj = sw_model(model, param) generates spin models, such as triangular lattice antiferromagnet, square lattice, etc. It also generates the magnetic ground state. For each lattice arbitrary number of further neighbor bonds can be defined using a vector of exchange values.

Input Arguments

model

String, name of the model, one of the following:

• 'triAF' Triangular lattice Heisenberg antiferromagnet in the \(ab\) plane (\(a=b=3\) Å), with γ = 120° angle and optimised magnetic structure.

• 'squareAF' Square lattice antiferromagnet.

• 'chain' Chain with further neighbor interactions.

• swm_* Custom models which are in the matlab path can be evaluated. Checkout: https://www.github.com/spinw/Models for pre-made models.

param

Input parameters of the model, row vector which gives the values of the Heisenberg exchange for first, second, thirs etc. neighbor bonds stored in p(1), p(2), p(3), etc. respectively.

Output Arguments

obj

spinw class object with the selected model.

See Also

spinw