Journal
APL MATERIALS
Volume 3, Issue 6, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4922769
Keywords
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Funding
- European Research Council (ERC Advanced Grant) [267579]
- French Agence Nationale de la Recherche (ANR) project MHANN
- French Agence Nationale de la Recherche (ANR) project NOMILOPS
- European Research Council (ERC) [267579] Funding Source: European Research Council (ERC)
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We explore the influence of the top electrode materials (W, Co, Ni, Ir) on the electronic band profile in ferroelectric tunnel junctions based on super-tetragonal BiFeO3. Large variations of the transport properties are observed at room temperature. In particular, the analysis of current vs. voltage curves by a direct tunneling model indicates that the metal/ferroelectric interfacial barrier height increases with the top-electrode work function. While larger metal work functions result in larger OFF/ON ratios, they also produce a large internal electric field which results in large and potentially destructive switching voltages. (C) 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
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