تقرير
A complete laboratory for transport studies of electron-hole interactions in GaAs/AlGaAs systems
| العنوان: | A complete laboratory for transport studies of electron-hole interactions in GaAs/AlGaAs systems |
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| المؤلفون: | de Cumis, Ugo Siciliani, Waldie, Joanna, Croxall, Andrew F., Taneja, Deepyanti, Llandro, Justin, Farrer, Ian, Beere, Harvey E., Ritchie, David A. |
| سنة النشر: | 2016 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | We present GaAs/AlGaAs double quantum well devices that can operate as both electron-hole (e-h) and hole-hole (h-h) bilayers, with separating barriers as narrow as 5 nm or 7.5 nm. With such narrow barriers, in the h-h configuration we observe signs of magnetic-field-induced exciton condensation in the quantum Hall bilayer regime. In the same devices we can study the zero-magnetic-field e-h and h-h bilayer states using Coulomb drag. Very strong e-h Coulomb drag resistivity (up to 10% of the single layer resistivity) is observed at liquid helium temperatures, but no definite signs of exciton condensation are seen in this case. Self-consistent calculations of the electron and hole wavefunctions show this might be because the average interlayer separation is larger in the e-h case than the h-h case. Comment: 5 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1063/1.4976505 |
| URL الوصول: | http://arxiv.org/abs/1611.08816 |
| رقم الأكسشن: | edsarx.1611.08816 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1063/1.4976505 |
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