Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2003-10-13
Phys. Rev. Lett. 93, 269703 (2004)
Physics
Condensed Matter
Strongly Correlated Electrons
Comment on Pudalov {\it et al}. Phys. Rev. Lett. {\bf 91}, 126403 (2003)
Scientific paper
10.1103/PhysRevLett.93.269703
We show that the recent experimental claim [Pudalov {\it et al}. \prl {\bf 91}, 126403 (2003) ] of observing ``interaction effects in the conductivity of Si inversion layers at intermediate temperatures'' is incorrect and misleading. In particular, the temperature dependent conductivity $\sigma$, in contrast to the resistivity (which is what is shown in the paper), does not have a linear temperature regime, rendering the extraction of the slope $d\sigma/dT$ completely arbitrary. We also show that, at least for higher densities, the standard semiclassical transport theory, which includes realistic disorder effects such as scattering by {\it screened} charged impurity and surface roughness, gives essentially quantitative agreement with the experimental data.
Hwang Euyheon H.
Sarma Sankar Das
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