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- W2143712367 abstract "Leakage current measurements were performed on epitaxial, single-crystal quality $mathrm{Pb}(mathrm{Zr},mathrm{Ti}){mathrm{O}}_{3}$ films with thicknesses in the $50--300phantom{rule{0.3em}{0ex}}mathrm{nm}$ range. It was found that the voltage behavior of the leakage current has a minor dependence on thickness, which rules out the space-charge limited currents as main leakage source. Temperature-dependent measurements were performed to obtain more information on the transport mechanism through the metal-ferroelectric-metal (MFM) structure. The results are analyzed in the frame of interface-controlled Schottky emission. A surprisingly low value of only $0.12--0.13phantom{rule{0.3em}{0ex}}mathrm{eV}$ was obtained for the potential barrier, which is much smaller than the reported value of $0.87phantom{rule{0.3em}{0ex}}mathrm{eV}$ [I. Stolichnov et al., Appl. Phys. Lett. 75, 1790 (1999)]. The result is explained by the effect of the ferroelectric polarization on the potential barrier height. The low value of the effective Richardson constant, of the order of ${10}^{ensuremath{-}7}--{10}^{ensuremath{-}6}phantom{rule{0.3em}{0ex}}mathrm{A}∕{mathrm{cm}}^{2}phantom{rule{0.2em}{0ex}}{mathrm{K}}^{2}$, suggests that the pure thermionic emission is not the adequate conduction mechanism for epitaxial MFM structures. The true mechanism might be interface-controlled injection, followed by a low mobility drift through the film volume." @default.
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- W2143712367 date "2007-03-08" @default.
- W2143712367 modified "2023-10-15" @default.
- W2143712367 title "Ferroelectric polarization-leakage current relation in high quality epitaxial<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi mathvariant=normal>Pb</mml:mi><mml:mrow><mml:mo>(</mml:mo><mml:mi mathvariant=normal>Zr</mml:mi><mml:mo>,</mml:mo><mml:mi mathvariant=normal>Ti</mml:mi><mml:mo>)</mml:mo></mml:mrow><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>films" @default.
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- W2143712367 doi "https://doi.org/10.1103/physrevb.75.104103" @default.
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