Subdimensional topologies, indicators, and higher order boundary effects

نویسندگان

چکیده

The study of topological band structures have sparked prominent research interest the past decade, culminating in recent formulation rather prolific classification schemes that encapsulate a large fraction phases and features. Within this context we recently reported on class unexplored thrive concept {\it sub-dimensional topology}. Although such trivial indicators representations when evaluated over complete Brillouin zone, they stable or fragile topologies within spaces, as planes lines. This perspective does not just refine pursuits, but can result observable features full dimensional sense. In three spatial dimensions (3D), for example, be characterized by non-trivial planes, having general invariants, are compensated Weyl nodes away from these planes. As result, 3D characteristics nodes, Fermi arcs edge states systematically predicted analysis. work further elaborate concepts. We present refined representation counting address distinctive bulk-boundary effects, include momentum depended (higher order) signature dependence perpendicular momentum. such, hope insights might spur new activities to deepen understanding phases.

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ژورنال

عنوان ژورنال: Physical review

سال: 2021

ISSN: ['0556-2813', '1538-4497', '1089-490X']

DOI: https://doi.org/10.1103/physrevb.103.195145