Establishing coherent momentum-space electronic states in locally ordered materials.

ABSTRACT: Rich momentum-dependent electronic structure naturally arises in solids with long-range crystalline symmetry. Reliable and scalable quantum technologies rely on materials that are either not perfect crystals or non-crystalline, breaking translational symmetry. This poses the fundamental questions of whether coherent momentum-dependent electronic states can arise without long-range order, and how they can be characterized. Here we investigate Bi₂Se₃, which exists in crystalline, nanocrystalline, and amorphous forms, allowing direct comparisons between varying degrees of spatial ordering. Through angle-resolved photoemission spectroscopy, we show for the first time momentum-dependent band structure with Fermi surface repetitions in an amorphous solid. The experimental d

SUBMITTER: Ciocys ST 

PROVIDER: S-EPMC11408612 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature