Experiments on a sufficiently disordered two-dimensional (2D) electron system in silicon reveal a new and unexpected kind of metallic behavior, where the conductivity decreases as σ(nₛ,T)0ex0ex=0ex0exσ(nₛ,T0ex0ex=0ex0ex0)+A(nₛ)T² (where nₛ is carrier density) to a nonzero value as temperature T→0. In 2D, the existence of a metal with dσ/dT>0 is very surprising. In addition, a novel type of a metal-insulator transition obtains, which is unlike any known quantum phase transition in 2D.
No takes yet. Share an insight, caveat, or question.
Feng et al. (2001) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: