Flavor altering excitations of composite fermions

Abstract

Past theoretical studies have considered excitations of a given flavor of composite fermions across composite-fermion quasi-Landau levels. We show that in general there exists a ladder of flavor changing excitations in which composite fermions shed none, some, or all of their vortices. The lowest energy excitations are obtained when the composite fermions do not change their flavor, whereas in the highest energy excitations they are stripped of all of their vortices, emerging as electrons in the final state. The results are relevant to the intriguing experimental discovery of Hirjibehedin {\em et al.} (cond-mat/0306152) of coexisting excitation modes of composite fermions of different flavor in the filling factor range $1/3>\nu \ge 1/5$.

5 pages, 4 figures

References in corpus (4)

• Theoretical Search for Nested Quantum Hall Effect of Composite Fermions
• Evidence of Landau levels and interactions in low-lying excitations of composite fermions at 1/3 <= ν<= 2/5
• Two-dimensional electron system in high magnetic fields: Wigner crystal vs. composite-fermion liquid
• Crossover and Coexistence of Quasiparticle Excitations in the Fractional Quantum Hall Regime at $\nu \le 1/3$

Cited by in corpus (7)

• Anomalous structure in the single particle spectrum of the fractional quantum Hall effect
• Spin-texture and magneto-roton excitations at nu=1/3
• Spin phase diagram of the nu_e=4/11 composite fermion liquid
• Second Generation of Moore-Read Quasiholes in a Composite Fermion Liquid
• Pair-distribution functions of correlated composite fermions
• Fermions out of Dipolar Bosons in the lowest Landau level
• Very high-energy collective states of partons in fractional quantum Hall liquids