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Electrically Induced Bulk and Edge Excitations in the Fractional Quantum Hall Regime

Quentin France1,2, Yunhyeon Jeong1, Akinori Kamiyama1, Takaaki Mano3, Ken-ichi Sasaki4, Masahiro Hotta1,5, and Go Yusa1

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Phys. Rev. Lett. 135, 066203 – Published 5 August, 2025

DOI: https://doi.org/10.1103/4bp5-9ryg

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 3×104  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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Phys. Rev. Lett. 135, 066203– Published 5 August, 2025
  • Received 3 February 2025
  • Revised 5 May 2025
  • Accepted 7 July 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

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