التفاصيل البيبلوغرافية
| العنوان: |
Non equilibrium anisotropic excitons in atomically thin ReS$_2$ |
| المؤلفون: |
Urban, J. M., Baranowski, M., Kuc, A., Klopotowski, L., Surrente, A., Ma, Y., Wlodarczyk, D., Suchocki, A., Ovchinnikov, D., Heine, T., Maude, D. K., Kis, A., Plochocka, P. |
| المصدر: |
2D Materials 6, 015012 (2019) |
| سنة النشر: |
2018 |
| المجموعة: |
Condensed Matter |
| مصطلحات موضوعية: |
Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: |
We present a systematic investigation of the electronic properties of bulk and few layer ReS$_2$ van der Waals crystals using low temperature optical spectroscopy. Weak photoluminescence emission is observed from two non-degenerate band edge excitonic transitions separated by $\sim$ 20 meV. The comparable emission intensity of both excitonic transitions is incompatible with a fully thermalized (Boltzmann) distribution of excitons, indicating the hot nature of the emission. While DFT calculations predict bilayer ReS$_2$ to have a direct fundamental band gap, our optical data suggests that the fundamental gap is indirect in all cases. |
| نوع الوثيقة: |
Working Paper |
| DOI: |
10.1088/2053-1583/aae9b9 |
| URL الوصول: |
http://arxiv.org/abs/1811.03461 |
| رقم الانضمام: |
edsarx.1811.03461 |
| قاعدة البيانات: |
arXiv |