Splitting of Long-Wavelength Modes of the Fractional Quantum Hall Liquid at $\nu =1/3$

Abstract

Resonant inelastic light scattering experiments at $\nu =1/3$ reveal a novel splitting of the long wavelength modes in the low energy spectrum of quasiparticle excitations in the charge degree of freedom. We find a single peak at small wavevectors that splits into two distinct modes at larger wavevectors. The evidence of well-defined dispersive behavior at small wavevectors indicates a coherence of the quantum fluid in the micron length scale. We evaluate interpretations of long wavelength modes of the electron liquid.

4 pages, 4 figures

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