2011/03/22 by Daniel Gunlycke, C. T. White, Carter T. White · 4 citations
Materials Science · Physics and Astronomy · #2D Materials and Applications #Graphene research and applications #Quantum and electron transport phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.106.136806
published as Phys. Rev. Lett. 106, 136806 (2011) · 5 pages, 4 figures
arxiv created 2011/03/22 · openalex publication_date 2011/03/28 · arxiv updated 2011/04/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
With its two degenerate valleys at the Fermi level, the band structure of graphene provides the opportunity to develop unconventional electronic applications. Herein, we show that electron and hole quasiparticles in graphene can be filtered according to which valley they occupy without the need to introduce confinement. The proposed valley filter is based on scattering off a recently observed line defect in graphene. Quantum transport calculations show that the line defect is semitransparent and that quasiparticles arriving at the line defect with a high angle of incidence are transmitted with a valley polarization near 100%.