Degenerate versus semi-degenerate transport in a correlated 2D hole system

Details Degenerate versus semi-degenerate transport in a correlated 2D hole system Degenerate versus semi-degenerate transport in a correlated 2D hole system

2011-04-26

arxiv.org/abs/1104.4834v1

Physical Review B, 83, 193301 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

accepted for publication in Phys. Rev. B

Scientific paper

It has been puzzling that the resistivity of high mobility two-dimensional(2D) carrier systems in semiconductors with low carrier density often exhibits a large increase followed by a decrease when the temperature ($T$) is raised above a characteristic temperature comparable with the Fermi temperature ($T_F$). We find that the metallic 2D hole system (2DHS) in GaAs quantum well (QW) has a linear density ($p$) dependent conductivity, $\sigma\approx e\mu^*(p-p_0)$, in both the degenerate (T<T_F$) is originated from the reduced $p_0$, the density of immobile carriers in a two-phase picture.

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