Román-Cortés Diego, Fadic Guillermo, Cid-Lara Christofer, Guzmán-Silva Diego, Real Bastián, Vicencio Rodrigo A
Departamento de Física and Millenium Institute for Research in Optics-MIRO, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Santiago, Chile.
Univ. Lille, CNRS, UMR 8523-PhLAM-Physique des Lasers Atomes et Molécules, 59000, Lille, France.
Sci Rep. 2021 Nov 1;11(1):21411. doi: 10.1038/s41598-021-00967-3.
Ribbon lattices are kind of transition systems in between one and two dimensions, and their study is crucial to understand the origin of different emerging properties. In this work, we study a Lieb ribbon lattice and the localization-delocalization transition occurring due to a reduction of lattice distances (compression) and the corresponding flat band deformation. We observe how above a critical compression ratio the energy spreads out and propagates freely across the lattice, therefore transforming the system from being a kind of insulator into a conductor. We implement an experiment on a photonic platform and show an excellent agreement with the predicted phenomenology. Our findings suggest and prove experimentally the use of compression or mechanical deformation of lattices to switch the transport properties of a given system.
带状晶格是介于一维和二维之间的一种过渡系统，对其研究对于理解不同新兴特性的起源至关重要。在这项工作中，我们研究了一个利布带状晶格以及由于晶格间距减小（压缩）和相应的平带变形而发生的局域化 - 非局域化转变。我们观察到，在超过临界压缩比时，能量会扩散并在晶格中自由传播，从而将系统从一种绝缘体转变为导体。我们在一个光子平台上进行了实验，并与预测的现象学表现出了极好的一致性。我们的研究结果通过实验表明并证明了利用晶格的压缩或机械变形来切换给定系统的传输特性。
