Fabricating superconducting interfaces between artificially grown LaAlO3 and SrTiO3 thin films
| Autor: | Li, Danfeng, A, Gariglio, Stefano, Cancellieri, Claudia, B, Fête, Alexandre, STORNAIUOLO, DANIELA, Triscone, Jean Marc |
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| Přispěvatelé: | Li, Danfeng, A, Gariglio, Stefano, Cancellieri, Claudia, B, Fête, Alexandre, Stornaiuolo, Daniela, Triscone, Jean Marc |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Superconductivity
Condensed Matter - Materials Science Nanostructure Materials science business.industry lcsh:Biotechnology Superlattice General Engineering Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences ddc:500.2 lcsh:QC1-999 Pulsed laser deposition Nanolithography lcsh:TP248.13-248.65 Optoelectronics General Materials Science Thin film business Fermi gas Nanoscopic scale lcsh:Physics |
| Zdroj: | APL Materials, Vol. 2, No 1 (2014) P. 012102 APL Materials APL Materials, Vol 2, Iss 1, Pp 012102-012102-8 (2014) APL MATERIALS |
| ISSN: | 2166-532X |
| Popis: | Realization of a fully metallic two-dimensional electron gas at the interface between artificially-grown LaAlO$_3$ and SrTiO$_3$ thin films has been an exciting challenge. Here we present for the first time the successful realization of a superconducting 2DEG at interfaces between artificially-grown LaAlO$_3$ and SrTiO$_3$ thin films. Our results highlight the importance of two factors-the growth temperature and the SrTiO$_3$ termination. We use local friction force microscopy and transport measurements to determine that in normal growth conditions the absence of a robust metallic state at low temperature in the artificially-grown LaAlO$_3$/SrTiO$_3$ interface is due to the nanoscale SrO segregation occurring on the SrTiO$_3$ film surface during the growth and the associated defects in the SrTiO$_3$ film. By adopting an extremely high SrTiO$_3$ growth temperature, we demonstrate a way to realize metallic, down to the lowest temperature, and superconducting 2DEG at interfaces between LaAlO$_3$ layers and artificially-grown SrTiO$_3$ thin films. This study paves the way to the realization of functional LaAlO$_3$/SrTiO$_3$ superlattices and/or artificial LaAlO$_3$/SrTiO$_3$ interfaces on other substrates. |
| Databáze: | OpenAIRE |
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