{
  "id": "1510.05042",
  "version": "v1",
  "published": "2015-10-16T22:38:23.000Z",
  "updated": "2015-10-16T22:38:23.000Z",
  "title": "Zeeman Splitting and Spin-Orbit Torques in Single Ni Nanoparticles",
  "authors": [
    "P. Gartland",
    "W. Jiang",
    "D. Davidovic"
  ],
  "comment": "4 pages, 4 figures",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We discuss measurements of discrete electron-in-a-box levels in Ni nanoparticles, using tunneling spectroscopy at 0.06K temperature. We use the amplitudes of the Zeeman-split levels to obtain the spin-transfer rate associated with sequential electron tunneling. In a strong magnetic field, the spin and the charge transfer rates are comparable, which demonstrates strong enhancement compared to the Slonczewski form of spin-transfer torque. In a low magnetic field, the discrete levels broaden into energy bands. The bandwidth is comparable to the spin-orbit energy $\\epsilon_{so}\\approx$ 0.6meV. The bands are interpreted in terms of the spectra of magnetic excitations close in energy and the van Hove singularity in their density of states, driven by mesoscopic spin-orbit torques. In those circumstances, the effective spin-transfer rate is far higher than the charge-transfer rate.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-10-16T22:38:23.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "single ni nanoparticles",
      "zeeman splitting",
      "spin-transfer rate",
      "discrete electron-in-a-box levels",
      "discrete levels broaden"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}