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arXiv · 2509.10958

Interaction-Driven Asymmetry in the Breakdown of the $\nu$ = 1 Quantum Hall State

Hoai Anh Ho·Jian Huang·L. N. Pfeiffer·K. W. West
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Abstract

We report real-time detection of longitudinal and transverse transport responses across distinct frequency bands in a ferromagnetic filling factor $\nu$ = 1 integer quantum Hall state. By tuning $\nu$, we simultaneously access the evolution of the screening environment and bulk excitation structure. The resulting asymmetric breakdown, for $\nu>1$ and $\nu<1$, reveals that interaction effects, rather than a single-particle band picture, dominate the transport instability. Our findings highlight the indispensability of electron-electron interactions even in integer quantum Hall phases, suggesting that distinct many-body entanglement structures underlie both integer and fractional topological phases.

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Hoai Anh Ho, Jian Huang, L. N. Pfeiffer, K. W. West. 2025-09-13. Interaction-Driven Asymmetry in the Breakdown of the $\nu$ = 1 Quantum Hall State. https://arxiv.org/abs/2509.10958

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