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Moving Dirac nodes by chemical substitution

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  • Additional Information
    • Contributors:
      Laboratoire de Physique des Solides (LPS); Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS); Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC); Muséum national d'Histoire naturelle (MNHN)-Institut de recherche pour le développement [IRD] : UR206-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS); Scuola Internazionale Superiore di Studi Avanzati / International School for Advanced Studies (SISSA / ISAS); CNR Istituto Officina dei Materiali (IOM); National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR); Elettra Sincrotrone Trieste; Synchrotron SOLEIL (SSOLEIL); Centre National de la Recherche Scientifique (CNRS); Laboratoire des Solides Irradiés - Irradiated Solids Laboratory (LSI); Institut Rayonnement Matière de Saclay (DRF) (IRAMIS); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X); Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-Centre National de la Recherche Scientifique (CNRS); Abdus Salam International Centre for Theoretical Physics [Trieste] (ICTP); ANR-10-LABX-0039,PALM,Physics: Atoms, Light, Matter(2010); European Project: 730872,H2020-EU.1.4. - EXCELLENT SCIENCE - Research Infrastructures / H2020-EU.1.4.1.2. - Integrating and opening existing national and regional research infrastructures of European interest,10.3030/730872,CALIPSOplus(2017); European Project: 692670,H2020,ERC-2015-AdG,FIRSTORM(2016)
    • Publication Information:
      Proceedings of the National Academy of Sciences, 2021.
    • Publication Date:
      2021
    • Abstract:
      Significance The on-demand control of topological properties with readily modifiable parameters is a fundamental step toward the design of novel electronic and spintronic devices. Here, we show that this goal can be achieved in the correlated system BaCo 1 − x Ni x S 2 , where we succeeded in significantly changing the reciprocal space position and shape of Dirac nodes by chemically substituting Ni with Co. We prove that the tunability of the Dirac states is realized by varying the electron-correlation strength and the charge-transfer gap, both sensitive to the substitution level, x . Based on our finding, a class of late-transition metal compounds can be established as prototypical for engineering highly tunable Dirac materials.
    • File Description:
      application/pdf
    • ISSN:
      1091-6490
      0027-8424
    • Accession Number:
      10.1073/pnas.2108617118
    • Rights:
      URL: https://www.pnas.org/site/aboutpnas/licenses.xhtml
    • Accession Number:
      edsair.doi.dedup.....1061957889743fe15071b195ad2f9268