Observation of pinning mode in Wigner solid of 1/3 fractional quantum Hall excitations
Abstract
We report the observation of a resonance in the microwave spectra of the real diagonal conductivities of a two-dimensional electron system within a range of ~ +- .0.015 from filling factor =1/3. The resonance is remarkably similar to resonances previously observed near integer , and is interpreted as the collective pinning mode of a disorder-pinned Wigner solid phase of e/3$-charged carriers .
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