{
  "id": "1707.05845",
  "version": "v1",
  "published": "2017-07-18T20:32:17.000Z",
  "updated": "2017-07-18T20:32:17.000Z",
  "title": "Many-body theory of trion absorption in a strong magnetic field",
  "authors": [
    "Dmitry K. Efimkin",
    "Allan H. MacDonald"
  ],
  "comment": "13 pages and 5 figures",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "In previous work we have argued that the optical properties of moderately doped two-dimensional semiconductors can be described in terms of excitons dressed by their interactions with a degenerate Fermi sea of additional charge carriers. These interactions split the bare exciton into attractive and repulsive exciton-polaron branches. The collective excitations of the coupled system are many-body generalizations of the bound trion and unbound states of a single electron interacting with an exciton. In this article we consider exciton-polarons in the presence of an external magnetic field that quantizes the kinetic energy of the electrons in the Fermi sea. Our theoretical approach is based on a transformation to new basis that respects the underlying symmetry of magnetic translations. We find that the attractive exciton-polaron branch is only weakly influenced by the magnetic field, whereas the repulsive branch exhibits magnetic oscillations and splits into discrete peaks that reflect combined exciton-cyclotron resonance.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-07-18T20:32:17.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "strong magnetic field",
      "many-body theory",
      "trion absorption",
      "exciton-polaron branch",
      "additional charge carriers"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 13,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}