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Tunneling electroresistance effect in Pt/MgO/Pt/PbTiO3/Pt ferroelectric tunnel junctions
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10.1063/1.4734513
/content/aip/journal/apl/101/2/10.1063/1.4734513
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/2/10.1063/1.4734513
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Figures

Image of FIG. 1.
FIG. 1.

Sketch of a Pt/MgO/PTO/Pt FTJ (a) and a Pt/MgO/Pt/PTO/Pt FTJ with the same composite barrier thickness (b). (c) and (d) show the calculated electrostatic potential profile and potential energy profile of the Pt/MgO/Pt/PTO/Pt FTJ, respectively. t d  = 4 Å, t m  = 8 Å, t f  = 1.6 nm,  = 0.45 Å,  = 10,  = 250, P = 70 μC/cm2, and EF  = 3 eV. The barrier heights for the dielectric and ferroelectric are taken as 2.5 and 0.6 eV, respectively.

Image of FIG. 2.
FIG. 2.

Conductance (a) and TER ratio (b) as a function of the thickness of MgO for Pt/MgO/Pt(two unit cells)/PTO/Pt FTJ (red color). The inset shows the MgO thickness dependence of the conductance for the Pt/MgO/PTO/Pt FTJ. The dashed scale and dotted line correspond to the relationship between the TER ratio and MgO thickness for the Pt/MgO/PTO/Pt FTJ (blue color). P = 70 μC/cm2.

Image of FIG. 3.
FIG. 3.

TER ratio as a function of the polarization strength of PTO for Pt/MgO(one ∼ two unit cells)/Pt(two unit cells)/PTO/Pt FTJs. TER-P curves for Pt/MgO/PTO/Pt FTJs with the same composite barrier thickness (unit cells) are also shown.

Image of FIG. 4.
FIG. 4.

TER ratio as a function of the polarization strength of PTO for Pt/MgO/Pt(one unit cell)/PTO/Pt and Pt/MgO/Pt(three unit cells)/PTO/Pt FTJs. TER-P curves for Pt/MgO/PTO/Pt FTJs with the same composite barrier thickness (unit cells) are also shown.

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/content/aip/journal/apl/101/2/10.1063/1.4734513
2012-07-11
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Tunneling electroresistance effect in Pt/MgO/Pt/PbTiO3/Pt ferroelectric tunnel junctions
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/2/10.1063/1.4734513
10.1063/1.4734513
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