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VOLUME 53 (1991) | ISSUE 9 | PAGE 461
Temperature dependence of the nonlocal resistance under conditions corresponding to the quantum Hall effect
The nonlocal electrical resistance of a single heterojunction of a special shape in a quantizing magnetic field has been studied experimentally. Comparison of the experimental results with theoretical predictions for filling factors close to / = 1.5 reveals the temperature dependence of the frequency of transitions between quantum levels. The experimental results are explained in terms of an electron-phonon scattering accompanied by a spin flip at the boundaries of the sample.