Report
Gate-tunable superconductivity at SrTiO3 surface realized by Al layer evaporation
| العنوان: | Gate-tunable superconductivity at SrTiO3 surface realized by Al layer evaporation |
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| المؤلفون: | Sengupta, Shamashis, Tisserond, Emilie, Linez, Florence, Monteverde, Miguel, Murani, Anil, Rödel, Tobias, Lecoeur, Philippe, Maroutian, Thomas, Marrache-Kikuchi, Claire, Santander-Syro, Andrés F., Fortuna, Franck |
| المصدر: | Journal of Applied Physics 124, 213902 (2018) |
| سنة النشر: | 2018 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity, Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | Electronic properties of low dimensional superconductors are determined by many-body-effects. This physics has been studied traditionally with superconducting thin films, and in recent times with two-dimensional electron gases (2DEGs) at oxide interfaces. In this work, we show that a superconducting 2DEG can be generated by simply evaporating a thin layer of metallic Al under ultra-high vacuum on a SrTiO3 crystal, whereby Al oxidizes into amorphous insulating alumina, doping the SrTiO3 surface with oxygen vacancies. The superconducting critical temperature of the resulting 2DEG is found to be tunable with a gate voltage with a maximum value of 360 mK. A gate-induced switching between superconducting and resistive states is demonstrated. Compared to conventionally-used pulsed-laser deposition (PLD), our work simplifies to a large extent the process of fabricating oxide-based superconducting 2DEGs. It will make such systems accessible to a broad range of experimental techniques useful to understand low-dimensional phase transitions and complex many-body-phenomena in electronic systems. Comment: 15 pages, 5 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1063/1.5049363 |
| URL الوصول: | http://arxiv.org/abs/1810.08069 |
| رقم الانضمام: | edsarx.1810.08069 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1063/1.5049363 |
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