Recently, topological conductivity has been predicted theoretically in LaNiO3(111)-based
superlattices. Here we report high-quality epitaxial LaNiO3/LaAlO3 superlattices on (111)-oriented
SrTiO3 and LaAlO3 single crystals. For both substrates a metal-insulator transition with decreasing
number of LaNiO3 monolayers is found. While the electrical transport is dominated by twodimensional
variable range hopping for superlattices grown on polar mismatched SrTiO3(111), it
switches to a thermally activated single gap behavior on polar matched LaAlO3(111). The gap
energy of the polar double-layer LaNiO3 superlattices can be tuned via the thickness of the insulating
LaAlO3 layers.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:23553 |
| Date | 07 August 2018 |
| Creators | Wei, Haoming, Grundmann, Marius, Lorenz, Michael |
| Publisher | American Institute of Physics, Universität Leipzig |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 0003-6951, 1077-3118, 082108 |
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