sw_extendlattice#

Syntax#

aList = sw_extendlattice(nExt,aList)

[aList, SSext] = sw_extendlattice(nExt,aList,SS)

Description#

aList = sw_extendlattice(nExt,aList) creates a superlattice and calculates all atomic positions within the new superlattice by tiling it with the original cell.

[aList, SSext] = sw_extendlattice(nExt,aList,SS) also calculates the bond matrix for the supercell by properly including all internal bonds and bonds between atoms in different supercells.

Input Arguments#

nExt

Size of the supercell in units of the original cell in a row vector with 3 elements.

aList

List of the atoms, produced by spinw.matom.

SS

Interactions matrices in the unit cell. Struct where each field contains an interaction matrix.

Output Arguments#

aList

Parameters of the magnetic atoms in a struct with the following fields:

  • RRext Positions of magnetic atoms in lattice units of the supercell stored in a matrix with dimensions of \([3\times n_{magExt}]\).

  • Sext Spin length of the magnetic atoms in a row vector with \(n_{magExt}\) number of elements.

SSext

Interaction matrix in the extended unit cell, struct type. In the struct every field is a matrix. Every column of the matrices describes a single bond, the following fields are generally defined:

  • iso Isotropic exchange interactions.

  • ani Anisotropic exchange interations.

  • dm Dzyaloshinsky-Moriya interaction terms.

  • gen General \([3\times 3]\) matrix contains the exchange interaction.

See Also#

spinw.intmatrix