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 $\nu =1/3$.

arXiv comment4 pages, 4 figures

References in corpus (11)

• Response functions and Spectrum of Collective Excitations of Fractional Quantum Hall Effect Systems
• Charged exctions in the fractional quantum Hall regime
• Magneto-roton excitation of fractional quantum Hall effect: Comparison between theory and experiment
• Evidence of Landau levels and interactions in low-lying excitations of composite fermions at 1/3 <= ν<= 2/5
• Composite-Fermion Picture for the Spin-Wave Excitation in the fractional quantum Hall system
• Effective Mass of the Four Flux Composite Fermion at $\nu =1/4$
• Hamiltonian Theory of the Fractional Quantum Hall Effect: Effect of Landau Level Mixing
• The excitonic collapse of higher Landau level fractional quantum Hall effect
• Light scattering observations of spin reversal excitations in the fractional quantum Hall regime
• Resonant Enhancement of Inelastic Light Scattering in the Fractional Quantum Hall Regime at $\nu =1/3$
• Effective mass staircase and the Fermi liquid parameters for the fractional quantum Hall composite fermions

Cited by in corpus (10)

• 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
• Flavor altering excitations of composite fermions
• 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
• Hamiltonian Theory of Disorder at 1/3
• Spin excitations in the Fractional Quantum Hall regime at $\nu \lesssim 1/3$