تقرير
Efficient charge modulation in ultrathin LaAlO$_3$-SrTiO$_3$ field-effect transistors
| العنوان: | Efficient charge modulation in ultrathin LaAlO$_3$-SrTiO$_3$ field-effect transistors |
|---|---|
| المؤلفون: | Smink, A. E. M., Prabowo, B., Stadhouder, B., Gauquelin, N., Schmitz, J., Hilgenkamp, H., van der Wiel, W. G. |
| سنة النشر: | 2019 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science, Physics - Applied Physics |
| الوصف: | At the LaAlO$_3$-SrTiO$_3$ interface, electronic phase transitions can be triggered by modulation of the charge carrier density, making this system an excellent prospect for the realization of versatile electronic devices. Here, we report repeatable transistor operation in locally gated LaAlO$_3$-SrTiO$_3$ field-effect devices of which the LaAlO$_3$ dielectric is only four unit cells thin, the critical thickness for conduction at this interface. This extremely thin dielectric allows a very efficient charge modulation of ${\sim}3.2\times10^{13}$ cm$^{-2}$ within a gate-voltage window of $\pm1$ V, as extracted from capacitance-voltage measurements. These also reveal a large stray capacitance between gate and source, presenting a complication for nanoscale device operation. Despite the small LaAlO$_3$ thickness, we observe a negligible gate leakage current, which we ascribe to the extension of the conducting states into the SrTiO$_3$ substrate. Comment: 5 pages, 4 figures. The following article has been submitted to Applied Physics Letters |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/1909.12586 |
| رقم الأكسشن: | edsarx.1909.12586 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |