Inverted hysteresis of magnetoresistance of a 2DEG at integer filling factors.

Authors :: Budantsev, M. V.
Pogosov, A. G.
Pokhabov, D. A.
Zhdanov, E. Yu.
Bakarov, A. K.
Toropov, A. I.
Portal, J. C.
Source :: AIP Conference Proceedings; 12/22/2011, Vol. 1399 Issue 1, p601-602, 2p
Publication Year :: 2011
Abstract: We report on an observation of giant hysteresis of longitudinal magnetoresistance of a constriction placed in a macroscopic two-dimensional electron gas at integer filling factors. The most striking feature of observed phenomenon is the inverted form of hysteresis loops which is manifested in advanced system response to a small change of external magnetic field. We found that the resistance in the region of hysteresis loop relaxes in a stepwise manner, that is phenomenologically similar to Barkhausen jumps. [ABSTRACT FROM AUTHOR]