Linear temperature dependence of conductivity in Si two-dimensional electrons near the apparent metal-to-insulator transition

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dc.creatorLai, K.
dc.creatorPan, W.
dc.creatorTsui, D. C.
dc.creatorLyon, S.
dc.creatorMuhlberger, M.
dc.creatorSchaffler, F.
dc.date2006-09-12
dc.date.accessioned2026-07-07T07:41:52Z
dc.date.available2026-07-07T07:41:52Z
dc.descriptionIn a high mobility two-dimensional electron system in Si, near the critical density, $n_c=0.32\times10^{11}$cm$^{-2}$, of the apparent metal-to-insulator transition, the conductivity displays a linear temperature ($T$) dependence around the Fermi temperature. When $σ_0$, the extrapolated T=0 conductivity from the linear T-dependence, is plotted as a function of density, two regimes with different $σ_0(n)$ relations are seen, suggestive of two different phases. Interestingly, a sharp transition between these two regimes coincides with $n_c$, and $σ_0$ of the transition is $\sim$ $e^2/h$, the quantum conductance, per square. Toward T=0, the data deviate from linear $σ(T)$ relation and we discuss the possible percolation type of transition in our Si sample.
dc.description4 Revtex pages, 3 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0609301
dc.identifierhttp://arxiv.org/abs/cond-mat/0609301
dc.identifierPhys. Rev. B 75, 033314 (2007)
dc.identifierdoi:10.1103/PhysRevB.75.033314
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/122275
dc.subjectMesoscale and Nanoscale Physics
dc.subjectStrongly Correlated Electrons
dc.titleLinear temperature dependence of conductivity in Si two-dimensional electrons near the apparent metal-to-insulator transition
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