{
  "id": "2006.00309",
  "version": "v1",
  "published": "2020-05-30T16:23:03.000Z",
  "updated": "2020-05-30T16:23:03.000Z",
  "title": "Experimental analysis of the spin-orbit coupling dependence on the drift velocity of a spin packet",
  "authors": [
    "N. M . Kawahala",
    "F. C. D. Moraes",
    "G. M. Gusev",
    "A. K. Bakarov",
    "F. G. G. Hernandez"
  ],
  "comment": "5 pages, 3 figures",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Spin transport was studied in a two-dimensional electron gas hosted in a wide GaAs quantum well occupying two subbands. Using space and time Kerr rotation microscopy to image drifting spin packets under an in-plane accelerating electric field, optical injection and detection of spin polarization were achieved in a pump-probe configuration. The experimental data exhibited high spin mobility and long spin lifetimes allowing to obtain the spin-orbit fields as a function of the spin velocities. Surprisingly, above moderate electric fields of 0.4V/cm with velocities higher than 2$\\mu$m/ns, we observed a dependence of both bulk and structure-related spin-orbit interactions on the velocity magnitude. A remarkable feature is the increase of the cubic Dresselhaus term to approximately half of the linear coupling when the velocity is raised to 10$\\mu$m/ns. In contrast, the Rashba coupling for both subbands decreases to about half of its value in the same range. These results yield new information for the application of drift models in spin-orbit fields and about limitations for the operation of spin transistors.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-05-30T16:23:03.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "spin-orbit coupling dependence",
      "spin packet",
      "experimental analysis",
      "drift velocity",
      "spin-orbit fields"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}