{
  "id": "0901.2895",
  "version": "v2",
  "published": "2009-01-19T17:13:00.000Z",
  "updated": "2009-05-11T13:31:53.000Z",
  "title": "Phonon cooling of nanomechanical beams with tunnel junctions",
  "authors": [
    "P. J. Koppinen",
    "I. J. Maasilta"
  ],
  "journal": "Phys. Rev. Lett. 102, 165502 (2009)",
  "doi": "10.1103/PhysRevLett.102.165502",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.supr-con"
  ],
  "abstract": "We demonstrate electronic cooling of 1D phonon modes in suspended nanowires for the first time, using normal metal--insulator--superconductor (NIS) tunnel junctions. Simultaneous cooling of both electrons and phonons to a common temperature was achieved. In comparison with non-suspended devices, better cooling performance is achieved in the whole operating range of bath temperatures between 0.1-0.7 K. The observed low-temperature thermal transport characteristics are consistent with scattering of ballistic phonons at the nanowire-bulk contact as being the mechanism limiting thermal transport. At the lowest bath temperature of the experiment $\\sim$ 100 mK, both phonons and electrons in the beam were cooled down to 42 mK, which is below the refrigerator bath temperature.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2009-05-11T13:31:53.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "63.22.-m",
      "85.25.Oj",
      "85.25.Pb",
      "85.85.+j"
    ],
    "keywords": [
      "tunnel junctions",
      "nanomechanical beams",
      "phonon cooling",
      "low-temperature thermal transport characteristics",
      "refrigerator bath temperature"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2009,
      "month": "Apr",
      "volume": 102,
      "number": 16,
      "pages": 165502
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2009PhRvL.102p5502K"
    }
  }
}