# What would happen to the plateau in QHE under gradual heating ?

In quantum Hall effect (QHE), the plateau observed in $R_H$ (Hall resistance) appearing precisely at multiples of $e^2/h$ is a characteristic feature. It can be observed only at low temperatures. My question is, what would happen to these plateau if the systems is heated gradually ? I imagine the plateau will disappear finally and the classical $R_H \sim B/ne$ may be recovered. Is there any experiments on this ? Is the recovery sharp or just a crossover ? Is there any scaling phenomena, say, quantities dependent on $k_BT/\hbar\omega_c$, with $T=$temperature, $\omega_c=$cyclotron frequency ?

• arxiv.org/ftp/cond-mat/papers/0702/0702408.pdf Aug 19 '14 at 21:25
• This is not what I'm looking for. I want to know how the plateau would evolve as temperature was raised.
– hyd
Aug 20 '14 at 0:54
• Which is why I didn't make it an answer. :-) You also asked about $k_B T / \hbar \omega_c$ as a scaling factor which ostensibly ignores the material and is thus clearly not enough information. The authors may also know the answer to your questions. Aug 20 '14 at 15:14