Chiral tunneling of topological states: towards the efficient generation of spin current using spin-momentum locking

K. M. Masum Habib, Redwan N. Sajjad, Avik W. Ghosh

We show that the interplay between chiral tunneling and spin-momentum locking of helical surface states leads to spin amplification and filtering in a 3D Topological Insulator (TI)…