Momentum-space nonsymmorphic symmetry meets higher-order topology
Y X Zhao
TL;DR
This paper explores how nonsymmorphic symmetry in momentum space can lead to new types of 3D topological insulators with unique corner states.
Contribution
The paper introduces a novel method to realize momentum-space nonsymmorphic symmetry using artificial crystals for higher-order topology.
Findings
Alternating 0 and π fluxes in artificial crystals achieves the nonsymmorphic group Pnnn.
This setup enables 3D octupole topological insulators with corner states.
The work demonstrates a new approach to higher-order topology in momentum space.
Abstract
Momentum-space nonsymmorphic group Pnnn has been achieved by alternating 0 and π fluxes in artificial crystals, enabling 3D octupole topological insulators with corner states.
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Taxonomy
TopicsTopological Materials and Phenomena · Cold Atom Physics and Bose-Einstein Condensates · Quantum, superfluid, helium dynamics