Composite-fermion analysis of the double-layer fractional quantum Hall system

Composite-fermion analysis of the double-layer fractional quantum Hall system.

Effect of interlayer tunneling in the double-layer fractional quantum Hall system at the total Landau level filling of ν = 1/m (m: odd integer ) is analyzed with the composite-fermion approach in which the flux attachment is directly applied to the electron-electron interaction. A comparison with a numerical result indicates that the vertically coupled Laughlin liquids may be regarded as a syst...

Composite-Fermion Picture for the Spin-Wave Excitation in the Fractional Quantum Hall System.

Spin-wave excitation mode from the spin-polarized ground state in the fractional quantum Hall liquid with odd fractions (ν = 1/3, 1/5) numerically obtained by the exact diagonalization of finite systems is shown to be accurately described, for wavelengths exceeding the magnetic length, in terms of the composite-fermion mean-field approximation for the spin-wave (magnon) theory formulated in the...

Phonon Mediated Transresistivity in a Double Layer Composite Fermion System

We consider the fractional drag in a double layer system of two-dimensional electrons in the half-filled lowest Landau level. At sufficiently large interlayer separations the drag is dominated by exchange of acoustic phonons and exhibits novel temperature and inter-layer distance dependences. At low temperatures the phonon mediated drag is strongly enhanced with respect to the case of zero magn...

Composite fermion theory of excitations in the fractional quantum Hall effect

Transport experiments are sensitive to charged ‘quasiparticle’ excitations of the fractional quantum Hall effect. Inelastic Raman scattering experiments have probed an amazing variety of other excitations: excitons, rotons, bi-rotons, trions, flavor altering excitons, spin waves, spin-flip excitons, and spin-flip rotons. This paper reviews the status of our theoretical understanding of these ex...

1 Composite Fermion Theory, Edge Currents and the Fractional Quantum Hall Effect