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- W2040983413 abstract "Abstract We have investigated the time scale of the excitation of electrons from localized to delocalized states in two-dimensional electron gas systems of GaAs/AlGaAs heterostructures at the integer quantum Hall effect (IQHE) breakdown. The measurements were performed by applying short electrical pulses (0.3 ns⩽pulse width ⩽10 ns) near integer filling factors (ν=2, 4, and 6) for different electron mobilities (10 T−1⩽μH⩽90 T−1). The IQHE breakdown occurs when exceeding a critical pulse width, which is a function of pulse amplitude, magnetic field, and electron mobility. Applying a simple model, we obtain an estimate for the critical drift lengths, which vary from about 1 to 25 μm. We interpret the critical times as drifting times for the delocalization, and the critical lengths as related to the inelastic scattering lengths lin of hot electrons causing the QHE breakdown." @default.
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- W2040983413 date "2002-03-01" @default.
- W2040983413 modified "2023-09-27" @default.
- W2040983413 title "Short-pulse excitation of quantum Hall systems: delocalization times and inelastic scattering lengths of hot electrons" @default.
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- W2040983413 doi "https://doi.org/10.1016/s0921-4526(01)01389-8" @default.
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