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Updated: Sep 10, 2025

Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials
Published on: January 21, 2016
Electrically Induced Bulk and Edge Excitations in the Fractional Quantum Hall Regime
Quentin France1,2, Yunhyeon Jeong1, Akinori Kamiyama1
1Tohoku University, Department of Physics, Sendai 980-8578, Japan.
Abstract:
We apply a voltage pulse to electrically excite the incompressible region of a two-dimensional electron liquid in the ν=2/3 fractional quantum Hall state and investigate the collective excitations in both the bulk and edge via photoluminescence spectral energy shifts. Introducing an offset in the voltage pulse significantly enhances the excitation signal. Real-space and time-resolved measurements reveal the dynamics of the bulk excitations, with an estimated group velocity of approximately 3×10^{4} m/s. These bulk excitations align well with the magnetoplasmon model. Because bulk and edge magnetoplasmons are composed of two polarization degrees of freedom of the gauge field, our results highlight a connection that could serve as a resource for their entanglement-similar to the polarization of a photon-and offer a novel approach to exploring solid-state analogs of quantum gravity.
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