{
  "id": "0908.1378",
  "version": "v1",
  "published": "2009-08-10T19:56:07.000Z",
  "updated": "2009-08-10T19:56:07.000Z",
  "title": "Effect of interdiffusion and quantum confinement on Raman spectra of the Ge/Si(100) heterostructures with quantum dots",
  "authors": [
    "I. V. Kucherenko",
    "V. S. Vinogradov",
    "N. N. Melnik",
    "L. V. Arapkina",
    "V. A. Chapnin",
    "K. V. Chizh",
    "V. A. Yuryev"
  ],
  "comment": "Reported at the 16th Int. Symp. \"Nanostructures: Physics and Technology\", Vladivostok, Russia, July 14-18, 2008",
  "journal": "Proc. 16th Int. Symp. \"Nanostructures: Physics and Technology\", Vladivostok, Russia, July 14-18, 2008",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci",
    "physics.optics"
  ],
  "abstract": "We used Raman scattering for study the phonon modes of self-organized Ge/Si quantum dots, grown by a molecular-beam epitaxy method. It is revealed, that Ge-Ge and Si-Ge vibrational modes considerably intensify at excitation of exciton between the {Lambda}3 valence and {Lanbda}1 conduction bands (transitions E1 and E1+{Delta}1), that allows to observe Raman scattering spectrum from extremely small volumes of Ge, even from one layer of quantum dots with the layer thickness of ~ 10 A. It is shown that Si diffuses into the Ge quantum dots from the Si spacer layers forming Ge_xSi_{1-x} solid solution, and Si concentration was estimated. It is revealed, that the frequency of Ge-Ge mode decreases in 10 1/cm at decreasing of the Ge layer thickness from 10 up to 6 A as a result of phonon size confinement effect.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-08-10T19:56:07.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "raman spectra",
      "quantum confinement",
      "vibrational modes considerably intensify",
      "interdiffusion",
      "heterostructures"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2009arXiv0908.1378K"
    }
  }
}