2025/09/13 by Hoai Anh Ho, Ho, Hoai Anh, Jian Huang +5
Physics and Astronomy · #Quantum and electron transport phenomena #Surface and Thin Film Phenomena #Semiconductor Quantum Structures and Devices
paper · pdf · doi:10.48550/arxiv.2509.10958
We report real-time detection of longitudinal and transverse transport responses across distinct frequency bands in a ferromagnetic filling factor ν = 1 integer quantum Hall state. By tuning ν, we simultaneously access the evolution of the screening environment and bulk excitation structure. The resulting asymmetric breakdown, for ν>1 and ν<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.