تقرير
Network model for periodically strained graphene
العنوان: | Network model for periodically strained graphene |
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المؤلفون: | De Beule, Christophe, Phong, Vo Tien, Mele, E. J. |
سنة النشر: | 2022 |
المجموعة: | Condensed Matter |
مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science |
الوصف: | The long-wavelength physics of monolayer graphene in the presence of periodic strain fields has a natural chiral scattering network description. When the strain field varies slowly compared to the graphene lattice and the effective magnetic length of the induced valley pseudomagnetic field, the low-energy physics can be understood in terms of valley-polarized percolating domain-wall modes. Inspired by a recent experiment, we consider a strain field with threefold rotation and mirror symmetries but without twofold rotation symmetry, resulting in a system with the connectivity of the oriented kagome network. Scattering processes in this network are captured by a symmetry-constrained phenomenological $S$ matrix. We analyze the phase diagram of the kagome network, and show that the bulk physics of the strained graphene can be qualitatively captured by the network when we account for a percolation transition at charge neutrality. We also discuss the limitations of this approach to properly account for boundary physics. Comment: 13 pages; 11 figures |
نوع الوثيقة: | Working Paper |
DOI: | 10.1103/PhysRevB.107.045405 |
URL الوصول: | http://arxiv.org/abs/2209.02554 |
رقم الأكسشن: | edsarx.2209.02554 |
قاعدة البيانات: | arXiv |
DOI: | 10.1103/PhysRevB.107.045405 |
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