Abstract:
It has been shown that the observation of the transitions between the dielectric phase and the integer-quantum-Hall-effect phases with the quantized Hall conductivity σxyq ≥ 3e2/h announced in a number of works is unjustified. In these works, the crossing points of the magnetic-field dependence of the diagonal resistivity ρxx at different temperatures T and ωcτ = 1 have been misidentified as the critical points of the phase transitions. In fact, these crossing points are due to the sign change of the derivative dρxx/dT owing to the quantum corrections to the conductivity. Here, ωc = eB/m is the cyclotron frequency, τ is the transport relaxation time, and m is the effective electron mass.
Citation:
S. S. Murzin, “On the phase boundaries of the integer quantum Hall effect. Part II”, Pis'ma v Zh. Èksper. Teoret. Fiz., 91:3 (2010), 166–168; JETP Letters, 91:3 (2010), 155–157
Linking options:
https://www.mathnet.ru/eng/jetpl648
https://www.mathnet.ru/eng/jetpl/v91/i3/p166
This publication is cited in the following 3 articles: