{
  "id": "0902.3099",
  "version": "v1",
  "published": "2009-02-18T11:08:58.000Z",
  "updated": "2009-02-18T11:08:58.000Z",
  "title": "Symmetry causes a huge conductance peak in double quantum dots",
  "authors": [
    "Robert S. Whitney",
    "P. Marconcini",
    "M. Macucci"
  ],
  "comment": "5pages 3 figures and an appendix ONLY in arXiv version",
  "journal": "R. S. Whitney, P. Marconcini, M. Macucci, \"Huge conductance peak caused by symmetry in double quantum dots\", Phys. Rev. Lett. 102, 186802 (2009)",
  "doi": "10.1103/PhysRevLett.102.186802",
  "categories": [
    "cond-mat.mes-hall",
    "nlin.CD"
  ],
  "abstract": "We predict a huge interference effect contributing to the conductance through large ultra-clean quantum dots of chaotic shape. When a double-dot structure is made such that the dots are the mirror-image of each other, constructive interference can make a tunnel barrier located on the symmetry axis effectively transparent. We show (via theoretical analysis and numerical simulation) that this effect can be orders of magnitude larger than the well-known universal conductance fluctuations and weak-localization (both less than a conductance quantum). A small magnetic field destroys the effect, massively reducing the double-dot conductance; thus a magnetic field detector is obtained, with a similar sensitivity to a SQUID, but requiring no superconductors.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-02-18T11:08:58.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.23.-b",
      "05.45.Mt",
      "74.40.+k"
    ],
    "keywords": [
      "huge conductance peak",
      "double quantum dots",
      "small magnetic field destroys",
      "well-known universal conductance fluctuations",
      "large ultra-clean quantum dots"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2009,
      "month": "May",
      "volume": 102,
      "number": 18,
      "pages": 186802
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2009PhRvL.102r6802W"
    }
  }
}