Magnetic field and filling factor dependences of R xy (left) and R xx (right) at E = E c (along the orange dashed line in a ). The filling factor for the R xy maximum and the R xx minimum disperses linearly with magnetic field (dashed lines). The best-fit slope is nMdv/dB = (1.00 + 0.05)e/h . Transport characteristics cannot be reliably probed in the black regions because of poor electrical contacts.
