Report
High-Harmonic Generation with a twist: all-optical characterization of magic-angle twisted bilayer graphene
| العنوان: | High-Harmonic Generation with a twist: all-optical characterization of magic-angle twisted bilayer graphene |
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| المؤلفون: | Molinero, Eduardo B., Datta, Anushree, Calderón, María J., Bascones, Elena, Silva, Rui E. F. |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter Quantum Physics |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Quantum Physics |
| الوصف: | If we stack up two layers of graphene while changing their respective orientation by some twisting angle, we end up with a system that has striking differences when compared to single-layer graphene. For a very specific value of this twist angle, known as magic angle, twisted bilayer graphene displays a unique phase diagram that cannot be found in other systems. Recently, high harmonic generation spectroscopy has been successfully applied to elucidate the electronic properties of quantum materials. The purpose of the present work is to exploit the nonlinear optical response of magic-angle twisted bilayer graphene to unveil its electronic properties. We show that the band structure of magic-angle twisted bilayer graphene is imprinted onto its high-harmonic spectrum. Specifically, we observe a drastic decrease of harmonic signal as we approach the magic angle. Our results show that high harmonic generation can be used as a spectroscopy tool for measuring the twist angle and also the electronic properties of twisted bilayer graphene, paving the way for an all-optical characterization of moir\'e materials. Comment: 5 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1364/OPTICA.510789 |
| URL الوصول: | http://arxiv.org/abs/2302.04127 |
| رقم الانضمام: | edsarx.2302.04127 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1364/OPTICA.510789 |
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