2005/01/01 by Wen Long, Qing‐Feng Sun, Qing-feng Sun +3
Computer Science · Engineering · Materials Science · Physics and Astronomy · #Advanced Image and Video Retrieval Techniques #Graphene research and applications #Handwritten Text Recognition Techniques #Image Retrieval and Classification Techniques #Molecular Junctions and Nanostructures #Quantum and electron transport phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.101.166806
published as Phys. Rev. Lett. 101, 166806 (2008) · 5 pages, 5 figures, submit to PRL on May 20, 2008
openalex publication_date 2005/01/01 · arxiv created 2008/07/10 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/06/11
We investigate the electron transport through a graphene p-n junction under a perpendicular magnetic field. By using the Landauer-Büttiker formalism combined with the nonequilibrium Green function method, the conductance is studied for clean and disordered samples. For the clean p-n junction, the conductance is quite small. In the presence of disorders, it is strongly enhanced and exhibits a plateau structure at a suitable range of disorders. Our numerical results show that the lowest plateau can survive for a very broad range of disorder strength, but the existence of high plateaus depends on system parameters and sometimes cannot be formed at all. When the disorder is slightly outside of this disorder range, some conductance plateaus can still emerge with its value lower than the ideal value. These results are in excellent agreement with a recent experiment.