Graphene p-n junctions with nonuniform Rashba spin-orbit coupling

Publish Year: 2011
Publisher:  Applied Physics Letters, 2011, 99, 162107
See this publication
Linear conductance of graphene-based p-n junctions with Rashba spin-orbit coupling is considered theoretically. A square potential step is used to model the junctions, while the coupling is introduced in terms of the Kane-Mele model (C. L. Kane and E. J. Mele, Phys. Rev. Lett. 95, 226801 (2005)). The main objective is a description of electronic transport in junctions where Rashba parameter is nonuniform. Such a nonuniformity can appear when graphene is asymmetrically covered with atomic layers, or when Rashba coupling is strongly dependent on electric field. It is shown that conductance is significantly modified by the considered nonuniformity, which is most clearly manifested by an anomalous minimum at a certain potential step height.

Contact | Contact database | RSS | Login
© 2024 CENTRUM NANOBIOMEDYCZNE UAM | ul. Wszechnicy Piastowskiej 3, PL 61614 Poznań, Poland | tel.+48 61 829 67 04.