{
  "id": "0706.0792",
  "version": "v1",
  "published": "2007-06-06T09:37:49.000Z",
  "updated": "2007-06-06T09:37:49.000Z",
  "title": "Persistence of the 0.7 anomaly of quantum point contacts in high magnetic fields",
  "authors": [
    "E. J. Koop",
    "A. I. Lerescu",
    "J. Liu",
    "B. J. van Wees",
    "D. Reuter",
    "A. D. Wieck",
    "C. H. van der Wal"
  ],
  "comment": "5 pages, 4 figures",
  "journal": "J. Supercond. Nov. Magn. 20, 433 (2007)",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "The spin degeneracy of the lowest subband that carries one-dimensional electron transport in quantum point contacts appears to be spontaneously lifted in zero magnetic field due to a phenomenon that is known as the 0.7 anomaly. We measured this energy splitting, and studied how it evolves into a splitting that is the sum of the Zeeman effect and a field-independent exchange contribution when applying a magnetic field. While this exchange contribution shows sample-to-sample fluctuations, it is for all QPCs correlated with the zero-field splitting of the 0.7 anomaly. This provides evidence that the splitting of the 0.7 anomaly is dominated by this field-independent exchange splitting.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2007-06-06T09:37:49.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "high magnetic fields",
      "persistence",
      "carries one-dimensional electron transport",
      "quantum point contacts appears",
      "field-independent exchange contribution"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2007arXiv0706.0792K"
    }
  }
}