%0 Journal Article
%T Classical versus Quantum Effects in the B=0 Conducting Phase in Two Dimensions
%A S. V. Kravchenko
%A D. Simonian
%A K. Mertes
%A M. P. Sarachik
%A T. M. Klapwijk
%J Physics
%D 1998
%I arXiv
%R 10.1103/PhysRevB.59.R12740
%X In the dilute two-dimensional electron system in silicon, we show that the temperature below which Shubnikov-de Haas oscillations become apparent is approximately the same as the temperature below which an exponential decrease in resistance is seen in B=0, suggesting that the anomalous behavior in zero field is observed only when the system is in a degenerate (quantum) state. The temperature dependence of the resistance is found to be qualitatively similar in B=0 and at integer Landau level filling factors.
%U http://arxiv.org/abs/cond-mat/9812389v1