{
  "id": "1904.07166",
  "version": "v1",
  "published": "2019-04-15T16:27:19.000Z",
  "updated": "2019-04-15T16:27:19.000Z",
  "title": "Voltage-tunable Majorana bound states in time-reversal symmetric bilayer quantum spin Hall hybrid systems",
  "authors": [
    "F. Schulz",
    "J. C. Budich",
    "E. G. Novik",
    "P. Recher",
    "B. Trauzettel"
  ],
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.supr-con",
    "quant-ph"
  ],
  "abstract": "We investigate hybrid structures based on a bilayer quantum spin Hall system in proximity to an s-wave superconductor as a platform to mimic time-reversal symmetric topological superconductors. In this bilayer setup, the induced pairing can be of intra- or inter-layer type, and domain walls of those different types of pairing potentials host Kramers partners (time-reversal conjugate pairs) of Majorana bound states. Interestingly, we discover that such topological interfaces providing Majorana bound states can also be achieved in an otherwise homogeneous system by a spatially dependent inter-layer gate voltage. This gate voltage causes the relative electron densities of the two layers to vary accordingly which suppresses the inter-layer pairing in regions with strong gate voltage. We identify particular transport signatures (zero-bias anomalies) in a five-terminal setup that are uniquely related to the presence of Kramers pairs of Majorana bound states.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-04-15T16:27:19.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "majorana bound states",
      "time-reversal symmetric bilayer quantum spin",
      "quantum spin hall hybrid systems",
      "symmetric bilayer quantum spin hall",
      "bilayer quantum spin hall hybrid"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}