Generalised Chern-Simons Theory of Composite Fermions in Bilayer Hall Systems

Details Generalised Chern-Simons Theory of Composite Fermions in Bilayer Hall Systems Generalised Chern-Simons Theory of Composite Fermions in Bilayer Hall Systems

1997-02-10

arxiv.org/abs/cond-mat/9702076v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Revtex file; 20 pages after processing; no figures

Scientific paper

10.1103/PhysRevB.56.6788

We present a field theory of Jain's composite fermion model as generalised to the bilayer quantum Hall systems. We define operators which create composite fermions and write the Hamiltonian exactly in terms of these operators. This is seen to be a complexified version of the familiar Chern Simons theory. In the mean-field approximation, the composite fermions feel a modified effective magnetic field exactly as happens in usual Chern Simons theories, and plateaus are predicted at the same values of filling factors as Lopez and Fradkin and Halperin . But unlike normal Chern Simons theories, we obtain all features of the first-quantised wavefunctions including its phase, modulus and correct gaussian factors at the mean field level. The familiar Jain relations for monolayers and the Halperin wavefunction for bilayers come out as special cases.

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