{
  "id": "cond-mat/9908411",
  "version": "v3",
  "published": "1999-08-27T15:44:37.000Z",
  "updated": "2000-08-18T13:12:59.000Z",
  "title": "Temperature enhanced persistent currents and \"$φ_0/2$ periodicity\"",
  "authors": [
    "M. V. Moskalets",
    "P. Singha Deo"
  ],
  "comment": "some typos corrected",
  "doi": "10.1103/PhysRevB.62.6920",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We predict a non-monotonous temperature dependence of the persistent currents in a ballistic ring coupled strongly to a stub in the grand canonical as well as in the canonical case. We also show that such a non-monotonous temperature dependence can naturally lead to a $\\phi_0/2$ periodicity of the persistent currents, where $\\phi_0$=h/e. There is a crossover temperature $T^*$, below which persistent currents increase in amplitude with temperature while they decrease above this temperature. This is in contrast to persistent currents in rings being monotonously affected by temperature. $T^*$ is parameter-dependent but of the order of $\\Delta_u/\\pi^2k_B$, where $\\Delta_u$ is the level spacing of the isolated ring. For the grand-canonical case $T^*$ is half of that for the canonical case.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2000-08-18T13:12:59.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "temperature enhanced persistent currents",
      "periodicity",
      "non-monotonous temperature dependence",
      "persistent currents increase",
      "canonical case"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. B"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}