论文标题
量子材料界面：石墨烯/鞭毛（111）异质结构
Quantum materials interfaces: graphene/Bismuth (111) heterostructures
论文作者
论文摘要
涉及石墨烯和鞭毛的异质结构具有在非常广泛的能量范围内吸收光的能力，这对于工程下一代光电都很感兴趣。对于此类异质结构的技术应用至关重要的是了解其特性的基本物理学。在这里，使用第一原理计算，我们研究了石墨烯和二晶膜之间的界面相互作用。我们的研究揭示了与这些超晶格的Moiré形态学相关的非直觉现象。尽管与具有大型自旋轨道耦合的基材靠近基板，但我们显示了石墨烯源性的狄拉克锥的保存，石墨烯对偶有性偶有性的电子结构特性的影响更大，并且在能量（几个MEV）中的令人惊讶的磁溶液的存在，比非磁性结构略高于非磁性结构，可能是有效的实验。与Moiré-Physics相关的这种微妙和意外的现象有望在二维量子系统异质组件的实际应用中起关键作用。
Heterostructures involving graphene and bismuth, with their ability to absorb light over a very wide energy range, are of interest for engineering next-generation opto-electronics. Critical to the technological application of such heterostructures is an understanding of the underlying physics governing their properties. Here, using first-principles calculations, we study the interfacial interactions between graphene and bismuth thin-films. Our study reveals non-intuitive phenomena associated with the moiré-physics of these superlattices. We show a preservation of graphene-derived Dirac cones in spite of proximity to a substrate with large spin-orbit coupling, a greater influence of graphene on the electronic structure properties of bismuth, and the surprising presence of a magnetic solution, only slightly higher in energy (by several meV) than the non-magnetic structure, possibly validating experiments. Such subtle and unanticipated phenomena associated with the moiré-physics are expected to play key roles in the practical applications of heterogeneous assemblies of two-dimensional quantum systems.
