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

Abstract

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 modes throughout the range $\nu \le 1/3$ are $\varphi =2$ excitations seen at 1/3. Both $\varphi =2$ and $\varphi =4$ excitations have distinct behaviors with temperature and filling factor. The abrupt first appearance of the new modes in the low energy excitation spectrum at $\nu \lesssim 1/3$ suggests a marked change in the quantum ground state on crossing the $\varphi =2\to \varphi =4$ boundary at $\nu =1/3$.

4 pages, 4 figures

Cited by in corpus (8)

• Anomalous structure in the single particle spectrum of the fractional quantum Hall effect
• Direct measurements of the fractional quantum Hall effect gaps
• Spin-texture and magneto-roton excitations at nu=1/3
• Filling factor dependence of the fractional quantum Hall effect gap
• Transition from Free to Interacting Composite Fermions away from $\nu$=1/3
• Splitting of Girvin-MacDonald-Platzman density wave and the nature of chiral gravitons in fractional quantum Hall effect
• Fermions out of Dipolar Bosons in the lowest Landau level
• Spin excitations in the Fractional Quantum Hall regime at $\nu \lesssim 1/3$