Apparent Metallic Behavior at B = 0 of a two-dimensional electron system in AlAs

Details Apparent Metallic Behavior at B = 0 of a two-dimensional electron system in AlAs Apparent Metallic Behavior at B = 0 of a two-dimensional electron system in AlAs

1999-03-31

arxiv.org/abs/cond-mat/9903443v1

Phys. Rev. B 57, R15068 (1998)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.57.R15068

We report the observation of metallic-like behavior at low temperatures and zero magnetic field in two dimensional (2D) electrons in an AlAs quantum well. At high densities the resistance of the sample decreases with decreasing temperature, but as the density is reduced the behavior changes to insulating, with the resistance increasing as the temperature is decreased. The effect is similar to that observed in 2D electrons in Si-MOSFETs, and in 2D holes in SiGe and GaAs, and points to the generality of this phenomenon.

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