论文标题
在石墨甲状腺氮化硼界面上的表面和散装电子状态的混合
Mixing of surface and bulk electronic states at a graphite-hexagonal boron nitride interface
论文作者
论文摘要
范德华组装可以在二维（2D）材料中对电子状态进行精美的设计，通常是通过使用Moiré超晶格在晶格上叠加长波长的周期性的。在这里，我们表明，在三维（3D）晶体（例如石墨）中的电子状态也可以通过与另一种晶体的界面上产生的超晶格电位调节，即晶体学对齐的六边形硝化硼。发现这种比对导致近地表2D状态的多种Lifshitz过渡和棕色Zak振荡，而在高磁场中，Hofstadter蝴蝶的分形状态深入Graphite的大体。我们的工作显示了使用2D Twistronics的方法来控制3D光谱的场所。
Van der Waals assembly enables exquisite design of electronic states in two-dimensional (2D) materials, often by superimposing a long-wavelength periodic potential on a crystal lattice using moiré superlattices. Here we show that electronic states in three-dimensional (3D) crystals such as graphite can also be tuned by the superlattice potential arising at the interface with another crystal, namely, crystallographically aligned hexagonal boron nitride. Such alignment is found to result in a multitude of Lifshitz transitions and Brown-Zak oscillations for near-surface 2D states whereas, in high magnetic fields, fractal states of Hofstadter's butterfly extend deep into graphite's bulk. Our work shows a venue to control 3D spectra by using the approach of 2D twistronics.
