{
  "id": "1708.07284",
  "version": "v1",
  "published": "2017-08-24T05:45:06.000Z",
  "updated": "2017-08-24T05:45:06.000Z",
  "title": "Large magnetoresistance dips and perfect spin-valley filter induced by topological phase transitions in silicene",
  "authors": [
    "Worasak Prarokijjak",
    "Bumned Soodchomshom"
  ],
  "comment": "25 pages, 6 Figures",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Spin-valley transport and magnetoresistance are investigated in silicene-based N/TB/N/TB/N junction where N and TB are normal silicene and topological barriers. The topological phase transitions in TB's are controlled by electric, exchange fields and circularly polarized light. As a result, we find that by applying electric and exchange fields, four groups of spin-valley currents are perfectly filtered, directly induced by topological phase transitions. Control of currents, carried by single, double and triple channels of spin-valley electrons in silicene junction, may be achievable by adjusting magnitudes of electric, exchange fields and circularly polarized light. We may identify that the key factor behind the spin-valley current filtered at the transition points may be due to zero and non-zero Chern numbers. Electrons that are allowed to transport at the transition points must obey zero-Chern number which is equivalent to zero mass and zero-Berry's curvature, while electrons with non-zero Chern number are perfectly suppressed. Very large magnetoresistance dips are found directly induced by topological phase transition points. Our study also discusses the effect of spin-valley dependent Hall conductivity at the transition points on ballistic transport and reveals the potential of silicene as a topological material for spin-valleytronics.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-08-24T05:45:06.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "topological phase transition",
      "large magnetoresistance dips",
      "perfect spin-valley filter",
      "transition points",
      "exchange fields"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 25,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}