Electrically induced bulk and edge excitations in the fractional quantum Hall regime

• URL: http://arxiv.org/abs/2502.01052v1
• Date: Mon, 03 Feb 2025 04:51:37 GMT
• Title: Electrically induced bulk and edge excitations in the fractional quantum Hall regime
• Authors: Quentin France, Yunhyeon Jeong, Akinori Kamiyama, Takaaki Mano, Ken-ichi Sasaki, Masahiro Hotta, Go Yusa,
• Abstract summary: We investigate the collective excitations in both the edge and bulk via photoluminescence spectral energy shifts. Introducing an offset in the voltage pulse significantly enhances the excitation signal. Results highlight the topological link between edge and bulk states, providing a novel approach to exploring solid-state analogs of quantum gravity.
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• Abstract: We apply a voltage pulse to electrically excite the incompressible region of a two-dimensional electron liquid in the $\nu=2/3$ fractional quantum Hall state and investigate the collective excitations in both the edge and bulk 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 $3 \times 10^4$ m/s. These bulk excitations align well with the magneto-plasmon model. Our results highlight the topological link between edge and bulk states, providing a novel approach to exploring solid-state analogs of quantum gravity.

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