Interlayer quantum transport in Dirac semimetal BaGa.

The quantum limit is quite easy to achieve once the band crossing exists exactly at the Fermi level (E) in topological semimetals. In multilayered Dirac fermion systems, the density of Dirac fermions on the zeroth Landau levels (LLs) increases in proportion to the magnetic field, resulting in intriguing angle- and field-dependent interlayer tunneling conductivity near the quantum limit. BaGa is an example of a multilayered Dirac semimetal with its quasi-2D Dirac cone located at E, providing a good platform to study its interlayer transport properties.