Helical Surface State in Multilayer Massless Dirac Fermion System
Akito Kobayashi, J. Phys. Soc. Jpn. 84, 053704 (2015).
Surface transport has revealed the existence of a helical surface state stabilized by resonant interlayer tunneling via the helical edge state in the ν = 0 quantum Hall ferromagnetic state in the organic Dirac fermion system.