Crossover and Coexistence of Quasiparticle Excitations in the Fractional Quantum Hall Regime at $\nu \le 1/3$

C. F. Hirjibehedin, A. Pinczuk, B. S. Dennis +2

New low-lying excitations are observed by inelastic light scattering at filling factors $\nu =p/(\varphi p\pm 1)$ of the fractional quantum Hall regime with $\varphi =4$. Coexisting with these mod…