{
  "id": "2408.02093",
  "version": "v1",
  "published": "2024-08-04T17:12:45.000Z",
  "updated": "2024-08-04T17:12:45.000Z",
  "title": "Floquet engineering of topological phase transitions in quantum spin Hall $α$-$T_{3}$ system",
  "authors": [
    "Kok Wai Lee",
    "Mateo Jalen Andrew Calderon",
    "Ching Hua Lee",
    "Xiang-Long Yu",
    "Pei-Hao Fu",
    "Yee Sin Ang"
  ],
  "comment": "10 pages, 5 figures",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "Floquet engineering of topological phase transitions driven by a high-frequency time-periodic field is a promising approach to realizing new topological phases of matter distinct from static states. Here, we theoretically investigate Floquet engineering topological phase transitions in the quantum spin Hall $\\alpha$-$T_{3}$ system driven by an off-resonant circularly polarized light. In addition to the quantum spin (anomalous) Hall insulator phase with multiple helical (chiral) edge states, spin-polarized topological metallic phases are expected, where the bulk topological band gap of one spin sub-band overlaps with the other gapless spin sub-band. Moreover, with a staggered potential, the topological invariants of the system depend on whether the middle band is occupied because of the breaking of particle-hole symmetry. Our work highlights the significance of Floquet engineering in realizing new topological phases in the $\\alpha$-$T_{3}$ lattice.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-08-04T17:12:45.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum spin hall",
      "floquet engineering",
      "engineering topological phase transitions",
      "bulk topological band gap",
      "high-frequency time-periodic field"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}