Fig. 1: Landau levels in different systems.
From: Observation of chiral Landau levels in a synthetic acoustic Weyl semimetal
a, b Schematics of a Dirac system (a), with the gray dot symbolizing the Dirac point (DP) and the flat achiral Landau levels (LLs) induced by the external magnetic field (b). c, d Schematics of a Weyl system (c), where the dots represent a pair of Weyl points (WPs) with opposite topological charges, and the chiral LLs induced by the external magnetic field (d). The red (blue) curves indicate the zeroth chiral LLs under opposite directions of the magnetic field.
