magnopy.LSWT.omega#

method

LSWT.omega(k, relative=False, units='meV')[source]#

Computes magnon's eigenenergies at the given k point.

Parameters:
k(3,) array-like

Reciprocal vector.

relativebool, default False

If relative=True, then k is interpreted as given relative to the reciprocal unit cell. Otherwise it is interpreted as given in absolute coordinates.

unitsstr, default "meV"

Added in version 0.3.0.

Units of energy. See Units of magnon energies for the full list of supported units.

Returns:
omegas(M, ) numpy.ndarray

Array of omegas. Note, that data type is complex. If the ground state is correct, then the complex part should be zero.

See also

LSWT.diagonalize
LSWT.delta

Examples

>>> import magnopy
>>> spinham = magnopy.examples.cubic_ferro_nn()
>>> lswt = magnopy.LSWT(spinham=spinham, spin_directions=[[0, 0, 1]])
>>> lswt.omega(k=[0, 0, 0.5], relative=True)
array([2.+0.j])