Landau levels as a probe for band topology in graphene moiré superlattices

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{
  "metadata": {
    "edited_by": 576, 
    "owner": 65, 
    "description": "We propose Landau levels as a probe for the topological character of electronic bands in two-dimensional moir\u00e9 superlattices. We consider two configurations of twisted double bilayer graphene (TDBG) that have very similar band structures, but show different valley Chern numbers of the flat bands. These differences between the AB-AB and AB-BA configurations of TDBG clearly manifest as different Landau level sequences in the Hofstadter butterfly spectra calculated using the tight-binding model. The Landau level sequences are explained from the point of view of the distribution of orbital magnetization in momentum space that is governed by the rotational C2 and time-reversal T symmetries. Our results can be readily extended to other twisted graphene multilayers and h-BN/graphene heterostructures thus establishing the Hofstadter butterfly spectra as a powerful tool for detecting the nontrivial valley band topology.", 
    "keywords": [
      "MARVEL/DD6", 
      "Landau level", 
      "Moire superlattice", 
      "twisted double bilayer graphene", 
      "band topology"
    ], 
    "is_last": true, 
    "title": "Landau levels as a probe for band topology in graphene moir\u00e9 superlattices", 
    "status": "published", 
    "license_addendum": null, 
    "doi": "10.24435/materialscloud:75-2h", 
    "conceptrecid": "1141", 
    "_files": [
      {
        "checksum": "md5:c90045eca9ee78566d46be36ca4eb1d7", 
        "description": "WannierTools's input files to generate the Landau level spectrum in the Reference", 
        "key": "data_for_PRL126_056401_2021.tar.gz", 
        "size": 14502234
      }
    ], 
    "references": [
      {
        "citation": "QuanSheng Wu, Jianpeng Liu, Yifei Guan, and Oleg V. Yazyev,\nPhys. Rev. Lett. 126, 056401(2021)", 
        "comment": "Paper in which the data is described", 
        "url": "https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.126.056401", 
        "doi": "10.1103/PhysRevLett.126.056401", 
        "type": "Journal reference"
      }
    ], 
    "contributors": [
      {
        "givennames": "QuanSheng", 
        "affiliations": [
          "Institute of Physics, Ecole Polytechnique F\u00e9d\u00e9rale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland", 
          "National Centre for Computational Design and Discovery of Novel Materials MARVEL, Ecole Polytechnique F\u00e9d\u00e9rale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland"
        ], 
        "familyname": "Wu", 
        "email": "quansheng.wu@epfl.ch"
      }, 
      {
        "givennames": "Jianpeng", 
        "affiliations": [
          "School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, China", 
          "ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University, Shanghai 200031, China"
        ], 
        "familyname": "Liu", 
        "email": "liujp@shanghaitech.edu.cn"
      }, 
      {
        "givennames": "Yifei", 
        "affiliations": [
          "Institute of Physics, Ecole Polytechnique F\u00e9d\u00e9rale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland"
        ], 
        "familyname": "Guan"
      }, 
      {
        "givennames": "Oleg V.", 
        "affiliations": [
          "Institute of Physics, Ecole Polytechnique F\u00e9d\u00e9rale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland", 
          "National Centre for Computational Design and Discovery of Novel Materials MARVEL, Ecole Polytechnique F\u00e9d\u00e9rale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland"
        ], 
        "familyname": "Yazyev", 
        "email": "oleg.yazyev@epfl.ch"
      }
    ], 
    "_oai": {
      "id": "oai:materialscloud.org:1142"
    }, 
    "publication_date": "Feb 17, 2022, 21:45:13", 
    "mcid": "2022.29", 
    "version": 1, 
    "id": "1142", 
    "license": "Creative Commons Attribution 4.0 International"
  }, 
  "revision": 6, 
  "created": "2021-12-05T15:12:07.317945+00:00", 
  "id": "1142", 
  "updated": "2022-02-17T20:45:13.585917+00:00"
}