Coupled spin states in armchair graphene nanoribbons with asymmetric zigzag edge extensions

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{
  "metadata": {
    "is_last": true, 
    "version": 1, 
    "title": "Coupled spin states in armchair graphene nanoribbons with asymmetric zigzag edge extensions", 
    "keywords": [
      "graphene nanoribbon", 
      "carbon magnetism", 
      "on-surface synthesis", 
      "MARVEL/DD3", 
      "SNSF", 
      "CSCS"
    ], 
    "description": "In this record we provide data supporting our recent work on coupled spin states in armchair nanoribbons. Exact positioning of sublattice imbalanced nanostructures in graphene nanomaterials offers a route to control interactions between induced local magnetic moments and to obtain graphene nanomaterials with magnetically nontrivial ground states. Our results reveal that such sublattice imbalanced nanostructures can be incorporated along a large band gap armchair graphene nanoribbon on the basis of asymmetric zigzag edge extensions, achieved by incorporating specifically designed precursor monomers. Scanning tunneling spectroscopy of an isolated and electronically decoupled zigzag edge extension reveals Hubbard-split states in accordance with theoretical predictions. Mean-field Hubbard-based modeling of pairs of such zigzag edge extensions reveals ferromagnetic, antiferromagnetic, or quenching of the magnetic interactions depending on the relative alignment of the asymmetric edge extensions. Moreover, a ferromagnetic spin chain is demonstrated for a periodic pattern of zigzag edge extensions along the nanoribbon axis.", 
    "license": "Creative Commons Attribution 4.0 International", 
    "references": [
      {
        "url": "https://pubs.acs.org/doi/10.1021/acs.nanolett.0c02077", 
        "type": "Journal reference", 
        "citation": "Q. Sun, X. Yao, O. Gr\u00f6ning, K. Eimre, P. A. Pignedoli, K. M\u00fcllen, A. Narita, R. Fasel, P. Ruffieux, Nano Lett. 9, 6429\u20136436 (2020)", 
        "comment": "Manuscript where the results are discussed", 
        "doi": "10.1021/acs.nanolett.0c02077"
      }, 
      {
        "url": "https://arxiv.org/abs/2005.02147", 
        "citation": "Q. Sun, X. Yao, O. Gr\u00f6ning, K. Eimre, P. A. Pignedoli, K. M\u00fcllen, A. Narita, R. Fasel, P. Ruffieux, arXiv:2005.02147", 
        "type": "Preprint"
      }
    ], 
    "doi": "10.24435/materialscloud:4b-jt", 
    "conceptrecid": "565", 
    "publication_date": "Oct 12, 2020, 12:30:58", 
    "edited_by": 100, 
    "_oai": {
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    "contributors": [
      {
        "affiliations": [
          "Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600 D\u00fcbendorf, Switzerland"
        ], 
        "familyname": "Sun", 
        "givennames": "Qiang"
      }, 
      {
        "affiliations": [
          "Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany"
        ], 
        "familyname": "Yao", 
        "givennames": "Xuelin"
      }, 
      {
        "affiliations": [
          "Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600 D\u00fcbendorf, Switzerland"
        ], 
        "familyname": "Gr\u00f6ning", 
        "givennames": "Oliver"
      }, 
      {
        "affiliations": [
          "Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600 D\u00fcbendorf, Switzerland"
        ], 
        "familyname": "Eimre", 
        "givennames": "Kristjan"
      }, 
      {
        "affiliations": [
          "Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600 D\u00fcbendorf, Switzerland"
        ], 
        "email": "carlo.pignedoli@empa.ch", 
        "familyname": "Pignedoli", 
        "givennames": "Carlo A."
      }, 
      {
        "affiliations": [
          "Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany"
        ], 
        "familyname": "M\u00fcllen", 
        "givennames": "Klaus"
      }, 
      {
        "affiliations": [
          "Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany", 
          "Organic and Carbon Nanomaterials Unit, Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa 904-0495, Japan"
        ], 
        "familyname": "Narita", 
        "givennames": "Akimitsu"
      }, 
      {
        "affiliations": [
          "Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600 D\u00fcbendorf, Switzerland", 
          "Department of Chemistry and Biochemistry, University of Bern, 3012 Bern, Switzerland"
        ], 
        "familyname": "Fasel", 
        "givennames": "Roman"
      }, 
      {
        "affiliations": [
          "Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600 D\u00fcbendorf, Switzerland"
        ], 
        "email": "pascal.ruffieux@empa.ch", 
        "familyname": "Ruffieux", 
        "givennames": "Pascal"
      }
    ], 
    "owner": 26, 
    "license_addendum": null, 
    "mcid": "2020.115", 
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    "status": "published"
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  "revision": 6, 
  "updated": "2020-10-12T10:30:58.214446+00:00", 
  "created": "2020-10-08T08:30:38.005126+00:00", 
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