Evidence of Landau levels and interactions in low-lying excitations of composite fermions at 1/3 <= ν<= 2/5

Irene Dujovne, A. Pinczuk, Moonsoo Kang +3

Excitation modes in the range $2/5\ge \nu \ge 1/3$ of the fractional quantum Hall regime are observed by resonant inelastic light scattering. Spectra of spin reversed excitations s…