3 papers
cond-mat.str-el2025
Strained hyperbolic Dirac fermions: Zero modes, flat bands, and competing orders
Christopher A. Leong, Bitan Roy
Starting from the nearest-neighbor tight-binding model on {10,3} and {14,3} hyperbolic lattices that, for a uniform hopping amplitude, gives rise to emergent Dirac fermions on a cu…
cond-mat.str-el2025
Amplified magnetic catalysis in non-Hermitian Euclidean and hyperbolic Dirac liquids
Christopher A. Leong, Bitan Roy
Due to their iconic linearly vanishing density of states near the zero-energy, half-filled two-dimensional Dirac materials in flat Euclidean and negatively-curved hyperbolic spaces…
cond-mat.mes-hall2025
Zero modes and index theorems for non-Hermitian Dirac fermions
Bitan Roy
Dirac fermions, subject to external magnetic fields and in the presence of mass orders that assume topologically nontrivial spatial textures such as domain wall and vortices, for e…