Low temperature metallic state induced by electrostatic carrier doping of SrTiO$_3$

Details Low temperature metallic state induced by electrostatic carrier doping of SrTiO$_3$ Low temperature metallic state induced by electrostatic carrier doping of SrTiO$_3$

2006-08-10

arxiv.org/abs/cond-mat/0608243v1

Appl. Phys. Lett. 89, 133504 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

3 pages, 4 figures

Scientific paper

10.1063/1.2357850

Transport properties of SrTiO$_3$-channel field-effect transistors with parylene organic gate insulator have been investigated. By applying gate voltage, the sheet resistance falls below $R_{\Box}$ $\sim$ 10 k$\Omega$ at low temperatures, with carrier mobility exceeding 1000 cm$^2$/Vs. The temperature dependence of the sheet resistance taken under constant gate voltage exhibits metallic behavior ($dR$/$dT$ $>$ 0). Our results demonstrate an insulator to metal transition in SrTiO$_3$ driven by electrostatic carrier density control.

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