# Fractional quantum Hall effect at a suppressed energy gap

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The effect of neutron-bombardment-induced atomic disorder on the galvanomagnetic properties of Sr2RuO4 single crystals has been experimentally studied in a broad range of temperatures (1.7â€“380 K) and magnetic fields (up to 13.6 T). The disorder leads to the appearance of negative...

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The quantum Hall effect takes place in a two-dimensional electron gas under a strong magnetic field and involves current flow along the edges of the sample. For some particleâ€“hole conjugate states of the fractional regime (for example, with fillings between 1/2 and 1 of the lowest Landau...

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Using an extended magnetohydrodynamic description, the excitation of tearing modes is analytically investigated in the tail plasma sheet region that includes the magnetic field components B0x(x,z) and B0z(x,z). Taking electron inertia and the Hall effect into account, a generalized technique is...