金属表面人工Lieb晶格的设计
Desiging Artificial Lieb Lattice on Metal Surface
摘要：
最近，一些实验已经表明，通过在金属表面沉积设计者分子晶格，可以操纵金属表面电子以形成二维（2D）晶格。这为构造人工二维电子晶格提供了一种很有前途的新技术。在这里，我们从理论上提出了一种分子晶格模式，以实现在金属表面上的人工Lieb晶格，这显示了一个平坦的电子带，由于晶格几何形状。我们表明，在平带的电子的本地化可以理解的电子干涉的观点，这可以通过测量局域态密度与扫描隧道显微镜探测。我们的建议可以很容易地在实验中实现，并可能提供一个理想的固态平台，研究新的Lieb晶格的平带物理。
英文摘要：
Recently, several experiments have illustrated that metal surface electrons can be manipulated to form a two dimensional (2D) lattice by depositing a designer molecule lattice on metal surface. This offers a promising new technique to construct artificial 2D electron lattices. Here we theoretically propose a molecule lattice pattern to realize an artificial Lieb lattice on metal surface, which shows a flat electronic band due to the lattice geometry. We show that the localization of electrons in the flat band may be understood from the viewpoint of electron interference, which may be probed by measuring the local density of states with the scanning tunnelling microscopy. Our proposal may be readily implemented in experiment and may offer an ideal solid state platform to investigate the novel flat band physics of the Lieb lattice.
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