{
  "id": "1603.08680",
  "version": "v1",
  "published": "2016-03-29T08:39:05.000Z",
  "updated": "2016-03-29T08:39:05.000Z",
  "title": "Electron phase shift at the zero-bias anomaly of quantum point contacts",
  "authors": [
    "B. Brun",
    "F. Martins",
    "S. Faniel",
    "B. Hackens",
    "A. Cavanna",
    "C. Ulysse",
    "A. Ouerghi",
    "U. Gennser",
    "D. Mailly",
    "P. Simon",
    "S. Huant",
    "V. Bayot",
    "M. Sanquer",
    "H. Sellier"
  ],
  "journal": "Physical Review Letters 116, 136801 (2016)",
  "doi": "10.1103/PhysRevLett.116.136801",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.str-el"
  ],
  "abstract": "The Kondo effect is the many-body screening of a local spin by a cloud of electrons at very low temperature. It has been proposed as an explanation of the zero-bias anomaly in quantum point contacts where interactions drive a spontaneous charge localization. However, the Kondo origin of this anomaly remains under debate, and additional experimental evidence is necessary. Here we report on the first phase-sensitive measurement of the zero-bias anomaly in quantum point contacts using a scanning gate microscope to create an electronic interferometer. We observe an abrupt shift of the interference fringes by half a period in the bias range of the zero-bias anomaly, a behavior which cannot be reproduced by single-particle models. We instead relate it to the phase shift experienced by electrons scattering off a Kondo system. Our experiment therefore provides new evidence of this many-body effect in quantum point contacts.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-03-29T08:39:05.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum point contacts",
      "zero-bias anomaly",
      "electron phase shift",
      "additional experimental evidence",
      "kondo system"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}