Magnon Interactions in Terbium

Intra-atomic aspects of magnon-plasmon interactions

Wrapping interactions at strong coupling – the giant magnon

We derive generalized Lüscher formulas for finite size corrections in a theory with a general dispersion relation. For the AdS5 × S5 superstring these formulas encode leading wrapping interaction effects. We apply the generalized μ-term formula to calculate finite size corrections to the dispersion relation of the giant magnon at strong coupling. The result exactly agrees with the classical str...

Magnon damping by magnon-phonon coupling in manganese perovskites

Inelastic neutron scattering was used to systematically investigate the spin-wave excitations ~magnons! in ferromagnetic manganese perovskites. In spite of the large differences in the Curie temperatures (TC’s! of different manganites, their low-temperature spin waves have very similar dispersions with the zone-boundary magnon softening and broadening that cannot be explained by the canonical d...

Magnon transistor for all-magnon data processing

An attractive direction in next-generation information processing is the development of systems employing particles or quasiparticles other than electrons--ideally with low dissipation--as information carriers. One such candidate is the magnon: the quasiparticle associated with the eigen-excitations of magnetic materials known as spin waves. The realization of single-chip all-magnon information...

Reflecting Magnon Bound States

In N = 4 super Yang-Mills spin chain, we compute reflection amplitudes of magnon bound-state off giant graviton. We first compute the reflection amplitude off Y = 0 brane boundary and compare it with the scattering amplitude between two magnon bound-states in the bulk. We find that analytic structure of the two amplitudes are intimately related each other: the boundary reflection amplitude is a...