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VOLUME 86 | ISSUE 2 | PAGE 148 Fractional quantum Hall effect at suppressed energy gap S. S. Murzin, S. I. Dorozhkin, G. E. Tsydynzhapov, V. N. Zverev Institute of Solid State Physics RAS, 142432 Chernogolovka, Moscow District, Russia PACS: 73.43.Qt Abstract In the fractional quantum Hall effect regime we measure diagonal (ρ xx) and Hall (ρ xy) magnetoresistivity tensor components of two-dimensional electron system (2DES) in gated GaAs/AlxGa1-xAs heterojunctions, together with capacitance between 2DES and the gate. We observe 1/3- and 2/3-fractional quantum Hall effect at rather low magnetic fields where corresponding fractional minima in the thermodynamical density of states have already disappeared implying suppression of the quasiparticle energy gaps. Download PS file (GZipped, 384.4K)  |  Download PDF file (442K) Список работ, цитирующих данную статью, см. здесь. List of articles citing this article can be found here.