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Gruverman, A; Wu, D; Lu, H; Wang, Y; Jang, H. W; Folkman, C. M; Zhuravlev, M. Ye; Felker, D; Rzchowski, M; Eom, C.-B; Tsymbal, E. Y
Nano letters, 10/2009, Letnik: 9, Številka: 10Journal Article
Using a set of scanning probe microscopy techniques, we demonstrate the reproducible tunneling electroresistance effect on nanometer-thick epitaxial BaTiO3 single-crystalline thin films on SrRuO3 bottom electrodes. Correlation between ferroelectric and electronic transport properties is established by direct nanoscale visualization and control of polarization and tunneling current. The obtained results show a change in resistance by about 2 orders of magnitude upon polarization reversal on a lateral scale of 20 nm at room temperature. These results are promising for employing ferroelectric tunnel junctions in nonvolatile memory and logic devices.
