{
  "id": "0803.3310",
  "version": "v3",
  "published": "2008-03-23T10:08:07.000Z",
  "updated": "2008-08-06T14:09:24.000Z",
  "title": "Measurement of the Current-Phase Relation in Josephson Junctions Rhombi Chains",
  "authors": [
    "I. M. Pop",
    "K. Hasselbach",
    "0. Buisson",
    "W. Guichard",
    "B. Pannetier",
    "I. Protopov"
  ],
  "comment": "to appear in Phys. Rev. B",
  "doi": "10.1103/PhysRevB.78.104504",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.supr-con"
  ],
  "abstract": "We present low temperature transport measurements in one dimensional Josephson junctions rhombi chains. We have measured the current phase relation of a chain of 8 rhombi. The junctions are either in the classical phase regime with the Josephson energy much larger than the charging energy, $E_{J}\\gg E_{C}$, or in the quantum phase regime where $E_{J}/E_{C}\\approx 2$. In the strong Josephson coupling regime ($E_{J}\\gg E_{C} \\gg k_{B}T$) we observe a sawtooth-like supercurrent as a function of the phase difference over the chain. The period of the supercurrent oscillations changes abruptly from one flux quantum $\\Phi_{0}$ to half the flux quantum $\\Phi_{0}/2$ as the rhombi are tuned in the vicinity of full frustration. The main observed features can be understood from the complex energy ground state of the chain. For $E_{J}/E_{C}\\approx 2$ we do observe a dramatic suppression and rounding of the switching current dependence which we found to be consistent with the model developed by Matveev et al.(Phys. Rev. Lett. {\\bf 89}, 096802(2002)) for long Josephson junctions chains.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2008-08-06T14:09:24.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "74.40.+k",
      "74.50.+r",
      "74.81.Fa",
      "73.23.-b"
    ],
    "keywords": [
      "current-phase relation",
      "dimensional josephson junctions rhombi chains",
      "low temperature transport measurements",
      "long josephson junctions chains",
      "phase regime"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2008,
      "month": "Sep",
      "volume": 78,
      "number": 10,
      "pages": 104504
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2008PhRvB..78j4504P"
    }
  }
}