spinw.nosym method

reduces symmetry to P0

Syntax

nosym(obj)

Description

nosym(obj) reduces the crystal symmetry to $P0$ but keeps all symmetry generated atoms, that become all symmetry inequivalent. The function can be used to test different types of symmetry breaking terms in the spin Hamiltonian.

Examples

The example generates an FCC cell using explicit translations. After applying the spinw.nosym function, the cryst.unit_cell.r contains the four generated atomic positions, that are not symmetry equivalent any more.

symOp = 'x+1/2,y+1/2,z;x+1/2,y,z+1/2;x,y+1/2,z+1/2'
cryst = spinw
cryst.genlattice('lat_const',[8 8 8],'sym',symOp,'label','FCC')
cryst.addatom('r',[0 0 0],'label','Atom1')
cryst.unit_cell.r

Output

     0
     0
     0

cryst.nosym
cryst.unit_cell.r

Output

         0    0.5000    0.5000         0
         0    0.5000         0    0.5000
         0         0    0.5000    0.5000

Input Arguments

obj: spinw object.

Output Arguments

The obj input will have obj.lattice.sym field equal to zero and the [obj.unit_cell] field will contain all the generated atomic positions.