2007/01/13 by Daniela Dragoman, Dragoman, Daniela
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Graphene research and applications #Quantum Physics (quant-ph) #Quantum and electron transport phenomena #Topological Materials and Phenomena
paper · pdf · doi:10.48550/arxiv.quant-ph/0701083
openalex publication_date 2007/01/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
It is demonstrated that both transmission and reflection coefficients associated to the Klein paradox at a step barrier are positive and less than unity, so that the particle-antiparticle pair creation mechanism commonly linked to this phenomenon is not necessary. Because graphene is a solid-state testing ground for quantum electrodynamics phenomena involving massless Dirac fermions we suggest that the transport characteristic through a p-n graphene junction can decide between the results obtained in this paper and the common Klein paradox theory, which imply negative transmission and higher-than-unity reflection coefficients. Recent experimental evidence supports our findings.