{
  "id": "1806.09576",
  "version": "v1",
  "published": "2018-06-25T17:22:25.000Z",
  "updated": "2018-06-25T17:22:25.000Z",
  "title": "Current splitting and valley polarization in elastically deformed graphene",
  "authors": [
    "Thomas Stegmann",
    "Nikodem Szpak"
  ],
  "comment": "8 pages, 9 figures",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Elastic deformations of graphene can significantly change the flow paths and valley polarization of the electric currents. We investigate these phenomena in graphene nanoribbons with localized out-of-plane deformations by means of tight-binding transport calculations. Such deformations can split the current into two beams of almost completely valley polarized electrons. These properties are observed for a fairly wide set of experimentally accessible parameters. We propose a valleytronic nanodevice in which a high polarization of the electrons comes along with a high transmission making the device very efficient. In order to gain a better understanding of these effects, we also treat the system in the continuum limit in which the electronic excitations can be described by the Dirac equation coupled to curvature and a pseudo-magnetic field. Semiclassical trajectories offer then an additional insight into the balance of forces acting on the electrons and provide a convenient tool for predicting the behavior of the current flow paths. The proposed device can also be used for a sensitive measurement of graphene deformations.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-06-25T17:22:25.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "valley polarization",
      "elastically deformed graphene",
      "current splitting",
      "current flow paths",
      "elastic deformations"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}