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Breakdown of universality in three-dimensional Dirac semimetals with random impurities

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Author(s)

  • Joao Pedro Santos Pires
  • Bruno Amorim
  • Aires Ferreira
  • Inanc Adagideli
  • Eduardo Mucciolo
  • Joao Manuel Parente Viana Lopes

Department/unit(s)

Publication details

JournalPhysical Review Research
DateAccepted/In press - 11 Feb 2021
DatePublished (current) - 25 Feb 2021
Volume3
Number of pages14
Original languageEnglish

Abstract

Dirac-Weyl semimetals are unique three-dimensional (3D) phases of matter with gapless electrons and novel electrodynamic properties believed to be robust against weak perturbations. Here, we unveil the crucial influence of the disorder statistics and impurity diversity in the stability of incompressible electrons in 3D semimetals. Focusing on the critical role played by rare impurity configurations, we show that the abundance of low-energy resonances in the presence of diluted random potential wells endows rare localized zero-energy modes with statistical significance, thus lifting the nodal density of states. The strong nonperturbative effect here reported converts the 3D Dirac-Weyl semimetal into a compressible metal even at the lowest impurity densities. Our analytical results are validated by high-resolution real-space simulations in record-large 3D lattices with up to 536 000 000 orbitals.

    Research areas

  • Weyl semimetals, Dirac semimetals, Disorder, Avoided quantum criticality, Quantum criticality, KITE

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