On the two-dimensional metallic state in silicon-on-insulator structures

Details On the two-dimensional metallic state in silicon-on-insulator structures On the two-dimensional metallic state in silicon-on-insulator structures

2002-07-05

arxiv.org/abs/cond-mat/0207170v1

Physics

Condensed Matter

Strongly Correlated Electrons

15 pages, 19 figures

Scientific paper

It is shown that the electronic conduction in silicon-on-insulator (SOI) layers exhibits a metallic regime which is very similar to that in high-mobility Si-metal oxide semiconductor structures (MOS). The peak in the electron mobility versus density, the strong drop in resistivity and the critical concentration for the metal-insulator transition are all consistent. On the basis of our SOI data for the temperature and in-plane magnetic field dependence of the resistivity, we discuss several models for the metallic state in two dimensions. We find that the observed behavior can be well described by the theory on the interaction corrections in the ballistic regime. For the investigated regime, the temperature dependent screening of scattering potentials gives also a good description of the data.

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