calculates the amplitude and phase of spin motion
SW_SPINMOTION(spectra, 'option1', value1 ...)
It calculates the amplitude and phase of the local spin precessions
belonging to a selected normal magnon mode.
Options:
iMagnon Index of the normal magnon mode. Number has to be between one
and nMagExt, the number of spins in the magnetic supercell.
Default is the first magnon mode.
Q Momentum of the magnon in reciprocal lattice units (r.l.u.).
Either a vector (Qh,Qk,Ql) where spectra is calculated with
dimensions of [3 1], or scalar denoting the index of the Q
point in the list of calculated Q points. Default is the first
Q point.
Output:
Spectra contains an additional spectra.motion field with the following
subfields:
Amp1, Amp2 Orthogonal spin wave amplitude vectors for every spin in
the magnetic supercell, dimensions are [3 nMagExt]. The
selected normal magnon will create on the i-th spin a
precession around the ground state direction along the
ellipse defined by the Amp1(:,i) and Amp2(:,i) orthogonal
vectors as major and minor axes. At t=0 the spin deviation
vector points along Amp1.
iQ Index the magnon momentum, spectra.hkl(:,iQ) gives the
magnon momentum in r.l.u. units.
iMagnon The index of the normal magnon mode.
omega Energy of the selected normal magnon mode. It gives also
See also SW.SPINWAVE.