{
  "id": "1009.2424",
  "version": "v2",
  "published": "2010-09-13T15:38:19.000Z",
  "updated": "2011-02-05T17:25:10.000Z",
  "title": "Cooper Pair Writing at the LaAlO3/SrTiO3 Interface",
  "authors": [
    "Cheng Cen",
    "Daniela F. Bogorin",
    "Chung Wung Bark",
    "Chad M. Folkman",
    "Chang-Beom Eom",
    "Jeremy Levy"
  ],
  "comment": "19 pages, 8 figures",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci",
    "cond-mat.supr-con"
  ],
  "abstract": "The LaAlO3/SrTiO3 interface provides a unique platform for controlling the electronic properties of the superconducting semiconductor SrTiO3. Prior investigations have shown that two-dimensional superconductivity can be produced at the LaAlO3/SrTiO3 interface and tuned electrostatically. The recently demonstrated reversible control of the metal-insulator transition at the same interface using conductive atomic force microscopy (c-AFM) raises the question of whether this room-temperature technique can produce structures that exhibit superconducting, normal metallic and insulating phases at sub-Kelvin temperatures. Here we report low-temperature magnetotransport experiments on conducting structures defined at an otherwise insulating LaAlO3/SrTiO3 interface. A quantum phase transition associated with the formation of Cooper pairs is observed in these predefined structures at sub-Kelvin temperatures. However, a finite resistance remains even at the lowest temperature. At higher magnetic fields, interfaces with high mobility also exhibit strong Shubnikov-de Haas oscillations as well as a larger Ginsburg-Landau coherence length. Cooper pair localization, spin-orbit coupling, and finite-size effects may factor into an explanation for some of the unusual properties observed.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2011-02-05T17:25:10.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "laalo3/srtio3 interface",
      "cooper pair writing",
      "strong shubnikov-de haas oscillations",
      "larger ginsburg-landau coherence length",
      "sub-kelvin temperatures"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 19,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2010arXiv1009.2424C"
    }
  }
}