تقرير
Third-order polarizability of interlayer excitons in hetero-bilayers
| العنوان: | Third-order polarizability of interlayer excitons in hetero-bilayers |
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| المؤلفون: | Quintela, M. F. C. Martins, Henriques, J. C. G., Peres, N. M. R. |
| المصدر: | Phys. Rev. B 104, 205433 (2021) |
| سنة النشر: | 2021 |
| المجموعة: | Condensed Matter Quantum Physics |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science, Quantum Physics |
| الوصف: | In this paper, we employ a fully microscopic approach to the study of interlayer excitons in hetero-bilayers. We use Fowler's and Karplus' method to access the dynamical polarizability of non--interacting interlayer excitons in a $\mathrm{WSe}_{2}/\mathrm{WS}_{2}$--based van der Waals heterostructure. Following from the calculation of the linear polarizability, we consider Svendsen's variational method to the calculation of the dynamic third--order polarizability. With this variational method, we study both two--photon absorption and third--harmonic generation processes for interlayer excitons in a $\mathrm{WSe}_{2}/\mathrm{WS}_{2}$ hetero--bilayer, discussing the various selection rules of intra--excitonic energy level transitions. Comment: 13 pages, 7 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.104.205433 |
| URL الوصول: | http://arxiv.org/abs/2106.11738 |
| رقم الأكسشن: | edsarx.2106.11738 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.104.205433 |
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