Abstract :
Charged excitons of composite fermions (CFs) are considered in the fractional quantum Hall effect. Energies of the charged CF excitons are computed at ν=1/3 as a function of the size of exciton. Our study suggests that the charged CF exciton with the size of a roton is lower in energy than the unbound state of a neutral roton and a lone charge. Therefore, we propose that the lowest-energy excitation of the fractional quantum Hall effect is in fact due to the charged excitons of composite fermions composed of two CF-particles and one CF-hole. The experimental relevance of the charged excitons of composite fermions is explored in the context of the resonant inelastic light scattering experiments.
