TITLE

Fractional quantum Hall effect at a suppressed energy gap

AUTHOR(S)
Murzin, S. S.; Dorozhkin, S. I.; Tsydynzhapov, G. E.; Zverev, V. N.
PUB. DATE
September 2007
SOURCE
JETP Letters;Sep2007, Vol. 86 Issue 2, p139
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In the fractional quantum Hall effect regime, the diagonal (ρxx) and Hall (ρxy) magnetoresistivity tensor components of the two-dimensional electron system (2DES) in gated GaAs/AlxGa1− x As heterojunctions are measured together with the capacitance between 2DES and the gate. The 1/3-and 2/3-fractional quantum Hall effects are observed at rather low magnetic fields where the corresponding fractional minima in the thermodynamic density of the states have already disappeared, thus, implying the suppression of the quasiparticle energy gaps.
ACCESSION #
26846073

 

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