{
  "id": "0709.0203",
  "version": "v1",
  "published": "2007-09-03T12:07:00.000Z",
  "updated": "2007-09-03T12:07:00.000Z",
  "title": "Enhancement of polarization in a spin-orbit coupling quantum wire with a constriction",
  "authors": [
    "Jun-Feng Liu",
    "Zhi-Cheng Zhong",
    "Lei Chen",
    "Dingping Li",
    "Chao Zhang",
    "Zhongshui Ma"
  ],
  "comment": "8 pages, 7 figures",
  "journal": "Phys. Rev. B 76, 195304 (2007)",
  "doi": "10.1103/PhysRevB.76.195304",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We investigate the enhancement of spin polarization in a quantum wire in the presence of a constriction and a spin-orbit coupling segment. It is shown that the spin-filtering effect is significantly heightened in comparison with the configuration without the constriction. It is understood in the studies that the constriction structure plays a critical role in enhancing the spin filtering by means of confining the incident electrons to occupy one channel only while the outgoing electrons occupy two channels. The enhancement of spin-filtering has also been analyzed within the perturbation theory. Because the spin polarization arises mainly from the scattering between the constriction and the segment with spin-orbit coupling, the sub-band mixing induced by spin-orbit interaction in the scattering process and the interferences result in higher spin-filtering effect.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2007-09-03T12:07:00.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.23.-b",
      "73.40.Gk"
    ],
    "keywords": [
      "spin-orbit coupling quantum wire",
      "enhancement",
      "spin polarization arises",
      "constriction structure plays",
      "higher spin-filtering effect"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2007,
      "month": "Nov",
      "volume": 76,
      "number": 19,
      "pages": 195304
    },
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2007PhRvB..76s5304L"
    }
  }
}