Escape from black holes in materials: Type II Weyl semimetals and generic edge states

Abstract

Type II Weyl semimetals are dictated by bulk excitations with tilted light cones, resembling the inside of black holes. We obtain generic boundary conditions for surface boundaries of the type II Weyl semimetals near Weyl nodes, and show that for a certain boundary condition edge states can escape out of the "black hole" event horizon. This means that for realization of the material "black hole" by the Type II Weyl semimetals a careful choice of the boundary condition is necessary.

8 pages, 4 figures; v2: references added

References in corpus (3)

• Flat Band in Disorder Driven Non-Hermitian Weyl Semimetals
• Black hole and Hawking radiation by type-II Weyl fermions
• Topological Phase with Critical-Type Nodal Line State in Intermetallic CaPd

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• Topologically Protected Wormholes in Type-III Weyl Semimetal Co${}_3$In${}_2$X${}_2$ (X = S, Se)
• Undamped transverse electric mode in undoped two-dimensional tilted Dirac cone materials
• Tilted Dirac Cones in Two-Dimensional Materials: Impact on Electron Transmission and Pseudospin Dynamics