Hopf semimetals are 4D gapless phases constructed via unstable homotopy maps from T^3 to S^2 that host nodal lines carrying Hopf flux along with unique gapless Fermi-arc, drumhead, Fermi-surface, and corner states.
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Classification of topological ladder models into six types (three BDI, three AIII) linked to Wilson fermion configurations, with bowtie ladder as canonical geometry from which others derive via unitary transformation.
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Hopf Semimetals
Hopf semimetals are 4D gapless phases constructed via unstable homotopy maps from T^3 to S^2 that host nodal lines carrying Hopf flux along with unique gapless Fermi-arc, drumhead, Fermi-surface, and corner states.
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Classification of topological ladder models
Classification of topological ladder models into six types (three BDI, three AIII) linked to Wilson fermion configurations, with bowtie ladder as canonical geometry from which others derive via unitary transformation.
- Rhombohedral graphite junctions as a platform for continuous tuning between topologically trivial and non-trivial electronic phases