(a) Cross-section of the studied sample and (b) sketch of the acoustic experiment setup.
(a) Magnetic field dependences of Γ and up to 18 T; (b) Γ and in fields of up to 5.5 T. Arrows denote the filling factors. f = 30 MHz; T = 0.3 K.
Dependence of at 30 MHz on a magnetic field at different temperatures. The filling factors are marked by arrows.
Magnetic field dependence of in minima of the oscillations with filling factors ν = 2, 4, 6, 8, 10, 12, and 14 at temperatures 0.3, 0.7, 1.1, and 1.6 K.
Magnetic field dependences of the real and imaginary parts of the ac conductivity; T = 0.3 K, f = 30 MHz.
Temperature dependence of the real and imaginary parts of the ac conductivity for different filling factors: (a) ν = 4, (b) ν = 5, (c) ν = 6, (d) ν = 7. The lines are guides to the eye.
Arrhenius plots of at various odd filling factors. Inset: The activation energy in magnetic field for odd filling factors. Lines are results of the linear fitting.
Dependences of Γ and on the magnetic field at different SAW powers; f = 30 MHz, T = 0.3 K.
Dependence of on magnetic field at different values of RF power introduced into the sample; T = 0.3 K.
Real part of the ac conductivity vs the SAW electric field for ν = 2, 4, 6; f = 30 MHz, T = 0.3 K. Inset: vs E 3∕7 for ν = 2, 4, 6. The lines are guides to the eye.
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