{
  "id": "2412.02445",
  "version": "v1",
  "published": "2024-12-03T13:29:21.000Z",
  "updated": "2024-12-03T13:29:21.000Z",
  "title": "Landé g-factors and spin dynamics of charge carriers in CuCl nanocrystals in a glass matrix",
  "authors": [
    "Dennis Kudlacik",
    "Evgeny A. Zhukov",
    "Dmitri R. Yakovlev",
    "Gang Qiang",
    "Marina A. Semina",
    "Aleksandr A. Golovatenko",
    "Anna V. Rodina",
    "Alexander L. Efros",
    "Alexey I. Ekimov",
    "Manfred Bayer"
  ],
  "comment": "33 pages Main file and 9 pages SI",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "The spin properties of charge carriers confined in CuCl semiconductor nanocrystals (NCs) of different sizes (radius from 1.8 nm up to 28 nm) crystallized in a glass matrix are studied experimentally and theoretically. By means of photoluminescence, spin-flip Raman scattering, time-resolved Faraday ellipticity, and time-resolved differential transmission performed at temperatures in the range of $1.6 - 120$ K at magnetic fields up to 8 T, comprehensive information on the Land\\'e $g$-factors as well as the population and spin dynamics is received. The spin signals are contributed by confined electrons with a $g$-factor close to 2, which shows a weak increase with decreasing NC size, i.e. increasing electron confinement energy. We revisit the theory of exciton confinement as a whole in spherical NCs within the six-band valence band model in order to describe the size dependence of the $Z_3$ and $Z_{1,2}$ exciton energies in CuCl NCs. We demonstrate theoretically that the stronger increase of the $Z_{1,2}$ energy transitions with decreasing radius can be explained by the strong absorption from the excited exciton state caused by strong heavy hole-light hole mixing in the exciton. The parameters of the six-band Hamiltonian describing both the exciton and hole kinetic energies are estimated from the comparison of the calculated and experimental size dependences of the exciton transitions. A theoretical model of the size-dependent Land\\'e $g$-factors for electron and hole confined in spherical NCs of semiconductors with negative spin-orbit splitting of the valence band is developed.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-12-03T13:29:21.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "charge carriers",
      "glass matrix",
      "spin dynamics",
      "cucl nanocrystals",
      "heavy hole-light hole mixing"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 33,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}