{
  "id": "0911.1903",
  "version": "v1",
  "published": "2009-11-10T13:16:16.000Z",
  "updated": "2009-11-10T13:16:16.000Z",
  "title": "NOR gate response in a double quantum ring: An exact result",
  "authors": [
    "Santanu K. Maiti"
  ],
  "comment": "8 pages, 5 figures",
  "journal": "Solid State Communications, Volume 149, Issues 47-48, December 2009, Pages 2146-2150",
  "doi": "10.1016/j.ssc.2009.09.025",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "NOR gate response in a double quantum ring, where each ring is threaded by a magnetic flux $\\phi$, is investigated. The double quantum ring is sandwiched symmetrically between two semi-infinite one-dimensional metallic electrodes and two gate voltages, namely, $V_a$ and $V_b$, are applied, respectively, in lower arms of the two rings those are treated as the two inputs of the NOR gate. A simple tight-binding model is used to describe the system and all the calculations are done through the Green's function formalism. Here we exactly calculate the conductance-energy and current-voltage characteristics as functions of the ring-to-electrode coupling strengths, magnetic flux and gate voltages. Our numerical study predicts that, for a typical value of the magnetic flux $\\phi=\\phi_0/2$ ($\\phi_0=ch/e$, the elementary flux-quantum), a high output current (1) (in the logical sense) appears if both the inputs to the gate are low (0), while if one or both are high (1), a low output current (0) results. It clearly demonstrates the NOR gate behavior and this aspect may be utilized in designing an electronic logic gate.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-11-10T13:16:16.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "double quantum ring",
      "gate response",
      "exact result",
      "magnetic flux",
      "semi-infinite one-dimensional metallic electrodes"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Solid State Communications",
      "year": 2009,
      "month": "Dec",
      "volume": 149,
      "number": 47,
      "pages": 2146
    },
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2009SSCom.149.2146M"
    }
  }
}