2009/06/09 by Stefano De Leo, P. Rotelli, Pietro Rotelli · 2 citations
Engineering · Physics and Astronomy · #Nonlinear Photonic Systems #Terahertz technology and applications #Topological Materials and Phenomena #hep-th
paper · pdf · doi:10.1140/epjc/s10052-009-1060-9
published as Eur.Phys.J.C63:157-162,2009 · 6 pages, 2 figures
openalex publication_date 2009/06/09 · arxiv created 2010/02/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
We present the results of the planar diffusion of a Dirac particle by step and barrier potentials, when the incoming wave impinges at an arbitrary angle with the potential. Except for right-angle incidence this process is characterized by the appearance of spin flip terms. For the step potential, spin flip occurs for both transmitted and reflected waves. However, we find no spin flip in the transmitted barrier result. This is surprising because the barrier result may be derived directly from a two-step calculation. We demonstrate that the spin flip cancellation indeed occurs for each particle (wave packet) contribution.