{
  "id": "0909.2401",
  "version": "v1",
  "published": "2009-09-13T07:39:09.000Z",
  "updated": "2009-09-13T07:39:09.000Z",
  "title": "Quantum Transport in Ladder-Type Networks: Role of nonlinearity, topology and spin",
  "authors": [
    "K. Nakamura",
    "D. Matrasulov",
    "G. Milibaeva",
    "J. Yusupov",
    "U. Salomov",
    "T. Ohta",
    "M. Miyamoto"
  ],
  "comment": "10 pages, 16 figures",
  "journal": "J. Phys. A: Math. Theor. 43 (2010) 145101",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We investigate quantum transport of electrons, phase solitons, etc. through mesoscopic networks of zero-dimensional quantum dots. Straight and circular ladders are chosen as networks with each coupled with three semi-infinite leads (with one incoming and the other two outgoing). Two transmission probabilities (TPs) as a function of the incident energy $\\epsilon$ show a transition from anti-phase aperiodic to degenerate periodic spectra at the critical energy $\\epsilon_c$ which is determined by a bifurcation point of the bulk energy dispersions. TPs of the circular ladder depend only on the parity of the winding number. Introduction of a single missing bond (MB) or missing step doubles the period of the periodic spectra at $\\epsilon>\\epsilon_c$ . Shift of the MB by lattice constant results in a striking switching effect at $\\epsilon<\\epsilon_c$. In the presence of the electric-field induced spin-orbit interaction (SOI), an obvious spin filtering occurs against the spin-unpolarized injection. Against the spin-polarized injection, on the other hand, the spin transport shows spin-flip (magnetization reversal) oscillations with respect to SOI. We also show a role of soliton in the context of its transport through the ladder networks.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-09-13T07:39:09.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum transport",
      "ladder-type networks",
      "nonlinearity",
      "lattice constant results",
      "degenerate periodic spectra"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/1751-8113/43/14/145101",
      "journal": "Journal of Physics A Mathematical General",
      "year": 2010,
      "month": "Apr",
      "volume": 43,
      "number": 14,
      "pages": 145101
    },
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2010JPhA...43n5101N"
    }
  }
}