Novel Families of Fractional Quantum Hall States: Pairing of Composite Fermions

Abstract

Fractional quantum Hall (FQH) states have recently been observed at unexpected values of the filling factor nu. Here we interpret these states as a novel family of FQH states involving pairing correlations rather than Laughlin correlations among the quasiparticles (QP's). The correlations depend upon the behavior of the QP-QP pseudopotential V_QP(L'), the interaction energy of a pair as a function of the pair angular momentum L'. This behavior, known from numerical studies of small systems, is used to demonstrate that pairing correlations give rise to FQH states at the experimentally observed values of nu.

to appear in Physics Letters A

References in corpus (2)

• Fractional Quantum Hall Effect of Composite Fermions
• Electron correlations in a partially filled first excited Landau level

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• Fractional quantum Hall effect and electron correlations in partially filled first excited Landau level
• Novel Families of Fractional Quantum Hall States : A Berry Phase Approach
• Residual interactions and correlations among Laughlin quasiparticles: Novel hierarchy states
• Excitations of the $\nu =5/2$ Fractional Quantum Hall State and the Generalized Composite Fermion Picture
• Charge and Statistics of Quasiholes in Pfaffian States of Composite Fermion Excitations