Composite-Fermion Picture for the Spin-Wave Excitation in the Fractional Quantum Hall System
Takashi Nakajima, Hideo Aoki
The spin-wave excitation mode from the spin-polarized ground state in the fractional quantum Hall system at the Landau level filling of $\ensuremath{\nu}=\frac{1}{(2m+1)}$ is shown, by comparing with the exact numerical result for finite systems, to be accurately described, for wavelengths exceeding the magnetic length, in terms of the composite-fermion picture for the spin-wave (magnon) theory formulated in the spherical geometry. This indicates that the composite-fermion approach extends to excited states and also provides the spin stiffness in terms of exchange interaction with transformed interparticle interactions.
arXiv:cond-mat/9408004•Physical Review Letters•Dec 26, 1994•40 citations