Multicellularity of delicate topological insulators

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{
  "metadata": {
    "edited_by": 100, 
    "owner": 612, 
    "description": "Being Wannierizable is not the end of the story for topological insulators. We introduce a family of topological insulators that would be considered trivial in the paradigm set by the tenfold way, topological quantum chemistry, and the method of symmetry-based indicators. Despite having a symmetric, exponentially localized Wannier representation, each Wannier function cannot be completely localized to a single primitive unit cell in the bulk. Such multicellular topology is shown to be neither stable nor fragile, but delicate; i.e., the topology can be nullified by adding trivial bands to either valence or conduction band.", 
    "keywords": [
      "topological insulators", 
      "delicate topology", 
      "multicellular Wannier functions", 
      "returning Thouless pump", 
      "Hopf insulator", 
      "SNSF", 
      "ERC", 
      "H2020", 
      "MARVEL/DD6"
    ], 
    "is_last": true, 
    "title": "Multicellularity of delicate topological insulators", 
    "status": "published", 
    "license_addendum": null, 
    "doi": "10.24435/materialscloud:ng-f1", 
    "conceptrecid": "1161", 
    "_files": [
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        "checksum": "md5:1427d439063ded7dc7831e914c8fb962", 
        "description": "Code that generates data for figure 2 in the main text: bulk and surface Wannier functions for the delicate topological insulator; total polarization", 
        "key": "Figure_2.py", 
        "size": 37454
      }, 
      {
        "checksum": "md5:fb985ab8c3fab5ecd1467da6e54ac573", 
        "description": "Code that generates data for figure 3 in the main text: polarization for the Hopf insulator", 
        "key": "Figure_3.py", 
        "size": 9545
      }, 
      {
        "checksum": "md5:4eea64e51d8878e582a0650a1ac3a154", 
        "description": "Code that generates data for figure 4 in the main text: spectrum of Hopf-insulating and RTP-insulating slab", 
        "key": "Figure_4.py", 
        "size": 19996
      }, 
      {
        "checksum": "md5:68b8cecbc559d398577a5fcba9cf0194", 
        "description": "Code that generates data for figure S2 in the supplementary material: stability of RTP invariant", 
        "key": "Figure_S2.py", 
        "size": 19836
      }
    ], 
    "references": [
      {
        "citation": "A. Nelson, T. Neupert, T. Bzdu\u0161ek, A. Alexandradinata, Phys. Rev. Lett. 126, 216404 (2021)", 
        "comment": "Published code generates data and figures for this paper", 
        "url": "https://doi.org/10.1103/PhysRevLett.126.216404", 
        "doi": "10.1103/PhysRevLett.126.216404", 
        "type": "Journal reference"
      }
    ], 
    "contributors": [
      {
        "givennames": "Aleksandra", 
        "affiliations": [
          "Department of Physics, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland"
        ], 
        "familyname": "Nelson", 
        "email": "anelson@physik.uzh.ch"
      }, 
      {
        "givennames": "Titus", 
        "affiliations": [
          "Department of Physics, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland"
        ], 
        "familyname": "Neupert"
      }, 
      {
        "givennames": "Tom\u00e1\u0161", 
        "affiliations": [
          "Condensed Matter Theory Group, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland", 
          "Department of Physics, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland"
        ], 
        "familyname": "Bzdu\u0161ek"
      }, 
      {
        "givennames": "Aris", 
        "affiliations": [
          "Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801-2918, USA", 
          "Physics Department, University of California Santa Cruz, Santa Cruz, CA 95064, USA"
        ], 
        "familyname": "Alexandradinata"
      }
    ], 
    "_oai": {
      "id": "oai:materialscloud.org:1162"
    }, 
    "publication_date": "Dec 13, 2021, 13:42:34", 
    "mcid": "2021.219", 
    "version": 1, 
    "id": "1162", 
    "license": "Creative Commons Attribution 4.0 International"
  }, 
  "revision": 9, 
  "created": "2021-12-10T20:35:46.615315+00:00", 
  "id": "1162", 
  "updated": "2021-12-13T12:42:34.582199+00:00"
}