Fig. 1: Boundary condition induced CABSs.
From: Observation of boundary induced chiral anomaly bulk states and their transport properties
a Schematic of the PC with a hard boundary. b Bulk band diagram. Inset images: the corresponding pressure (colors) and energy flux fields (arrows) of the eigenstates in the unit cell. The red (blue) band is even (odd) with respect to the mirror plane marked by the dotted line. c Band dispersion of the PC with a hard boundary, where the periodic boundary condition is in the x-direction and its width is \(12\) layers (each layer is \(\frac{\sqrt{3}}{2}a\) wide) along the y-direction. Left panel: pressure (colors) and energy flux (arrows) fields and the pressure phase (colors) field of the CABS. The pseudogap (shadow region) is caused by the finite width of the PC waveguide. d The distribution of Dirac mass \(m\) along y-direction in the continuum model (see text).
