A New Instance of a Composite Fermion Bubble Phase

A recent magnetotransport study of the fractional quantum Hall effect reported the discovery of a reentrant fractional state in the flanks of the ν = 5/3 plateau. This reentrant fractional state was interpreted as a bubble phase of composite fermions. Here, we report the observation of a similar bubble phase of composite fermions in the flanks of the ν = 2/3 plateau and another possibly appearing near ν = 3/5, demonstrating that charge ordered fractional phases are not limited to one filling factor. Within composite fermion theory, the phases near ν = 2/3 and ν = 5/3 share the same quasiparticle flux attachment. We then discuss the possible compositions of these phases. Our results highlight charge ordering of emergent quasiparticles across multiple fractional quantum Hall states as a generic feature of the fractional quantum Hall regime.