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On the engineering of higher-order Van Hove singularities in two dimensions

Author

Listed:
  • Anirudh Chandrasekaran

    (Loughborough University)

  • Luke C. Rhodes

    (University of St Andrews)

  • Edgar Abarca Morales

    (University of St Andrews
    Max Planck Institute for Chemical Physics of Solids)

  • Carolina A. Marques

    (University of St Andrews
    Universität Zürich)

  • Phil D. C. King

    (University of St Andrews)

  • Peter Wahl

    (University of St Andrews
    Universität Bonn)

  • Joseph J. Betouras

    (Loughborough University)

Abstract

The properties of correlated electron materials are often intricately linked to Van Hove singularities (VHS) in the vicinity of the Fermi energy. The class of these VHS is of great importance, with higher-order ones—with power-law divergence in the density of states—leaving frequently distinct signatures in physical properties. We use a new theoretical method to detect and analyse higher-order VHS (HOVHS) in two-dimensional materials and apply it to the electronic structure of the surface layer of Sr2RuO4. We then constrain a low energy model of the VHS of the surface layer of Sr2RuO4 against angle-resolved photoemission spectroscopy and quasiparticle interference data to analyse the VHS near the Fermi level. We show how these VHS can be engineered into HOVHS.

Suggested Citation

  • Anirudh Chandrasekaran & Luke C. Rhodes & Edgar Abarca Morales & Carolina A. Marques & Phil D. C. King & Peter Wahl & Joseph J. Betouras, 2024. "On the engineering of higher-order Van Hove singularities in two dimensions," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-53650-2
    DOI: 10.1038/s41467-024-53650-2
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    1. Federico Mazzola & Wojciech Brzezicki & Maria Teresa Mercaldo & Anita Guarino & Chiara Bigi & Jill A. Miwa & Domenico Fazio & Alberto Crepaldi & Jun Fujii & Giorgio Rossi & Pasquale Orgiani & Sandeep , 2024. "Signatures of a surface spin–orbital chiral metal," Nature, Nature, vol. 626(8000), pages 752-758, February.
    2. Noah F. Q. Yuan & Hiroki Isobe & Liang Fu, 2019. "Magic of high-order van Hove singularity," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
    3. Yong Hu & Xianxin Wu & Brenden R. Ortiz & Sailong Ju & Xinloong Han & Junzhang Ma & Nicholas C. Plumb & Milan Radovic & Ronny Thomale & Stephen D. Wilson & Andreas P. Schnyder & Ming Shi, 2022. "Rich nature of Van Hove singularities in Kagome superconductor CsV3Sb5," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
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