{
  "id": "2006.03384",
  "version": "v1",
  "published": "2020-06-05T11:43:51.000Z",
  "updated": "2020-06-05T11:43:51.000Z",
  "title": "Intrinsic and extrinsic spin-orbit coupling and spin relaxation in monolayer PtSe$_2$",
  "authors": [
    "Marcin Kurpas",
    "Jaroslv Fabian"
  ],
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Monolayer PtSe$_2$ is a semiconducting transition metal dichalcogenide characterized by an indirect band gap, space inversion symmetry, and high carrier mobility. Strong intrinsic spin-orbit coupling and the possibility to induce extrinsic spin-orbit fields by gating make PtSe$_2$ attractive for fundamental spin transport studies as well as for potential spintronics applications. We perform a systematic theoretical study of the spin-orbit coupling and spin relaxation in this material. Specifically, we employ first principles methods to obtain the basic orbital and spin-orbital properties of PtSe$_2$, also in the presence of an external transverse electric field. We calculate the spin mixing parameters $b^2$ and the spin-orbit fields $\\Omega$ for the Bloch states of electrons and holes. This information allows us to predict the spin lifetimes due to the Elliott-Yafet and D'yakonov-Perel mechanisms. We find that $b^2$ is rather large, on the order of $10^{-2}$ and $10^{-1}$, while $\\Omega$ varies strongly with doping, being about $10^{3} - 10^{4}$\\,ns$^{-1}$ for %typical Fermi levels in the interval $(10-100)$ meV, carrier density in the interval $10^{13}-10^{14}$\\,cm$^{-2}$ at the electric field of 1 V/nm. We estimate the spin lifetimes to be on the picosecond level.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-06-05T11:43:51.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "spin relaxation",
      "extrinsic spin-orbit coupling",
      "monolayer ptse",
      "transition metal dichalcogenide",
      "external transverse electric field"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}