Phys.org  April 10, 2024 The nexus of topology and interactions yield important research directions. Using tunnelling microscopy, photoemission spectroscopy and a theoretical analysis an international team of researchers (USA – Princeton University, University of Alabama at Birmingham, Florida State University, Oak Ridge National laboratory, UK, Singapore, China, Switzerland) has shown a “hybrid” topological phase of matter in elemental-solid arsenic. They showed that arsenic features a conjoined strong and higher-order topology that stabilizes a hybrid topological phase. Measurements unraveled a unique geometry of topologically induced step-edge conduction channels. Using theoretical models, they showed that the existence of gapless step-edge states in […]