Locally incompressible form of the fractional quantum Hall effect at <i>v=</i> 3/2
We studied neutral excitations in a two-dimensional electron gas with an orbital momentum 1 and spin projection over the magnetic field axis 1 in the vicinity of a filling factor of 3/2. It is shown that in the vicinity of 3/2, a significant increase in the relaxation time (τ = 13 μs) for the excitations to the ground state is exhibited even though the number of vacancies in the lowest energy level is macroscopically large. The decrease in the relaxation rate is related to the spin texture transformation in the ground state induced by spin flips and electron density rearrangement. Based on the experimental data we believe that the 3/2 state is an example of a locally incompressible fractional quantum Hall state.