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Yukawa-Lorentz symm...
Yukawa-Lorentz symmetry in non-Hermitian Dirac materials
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- Juričić, Vladimir (author)
- KTH,Nordic Institute for Theoretical Physics NORDITA,Departamento de Física, Universidad Técnica Federico Santa María, Casilla 110, Valparaíso, Chile
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- Roy, Bitan (author)
- Department of Physics, Lehigh University, 18015, Bethlehem, PA, USA
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(creator_code:org_t)
- Springer Nature, 2024
- 2024
- English.
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In: Communications Physics. - : Springer Nature. - 2399-3650. ; 7:1
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
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- Lorentz space–time symmetry represents a unifying feature of the fundamental forces, typically manifest at sufficiently high energies, while in quantum materials it emerges in the deep low-energy regime. However, its fate in quantum materials coupled to an environment thus far remained unexplored. We here introduce a general framework of constructing symmetry-protected Lorentz-invariant non-Hermitian (NH) Dirac semimetals (DSMs), realized by invoking masslike anti-Hermitian Dirac operators to its Hermitian counterpart. Such NH DSMs feature purely real or imaginary isotropic linear band dispersion, yielding a vanishing density of states. Dynamic mass orderings in NH DSMs thus take place for strong Hubbard-like local interactions through a quantum phase transition, hosting a non-Fermi liquid, beyond which the system becomes an insulator. We show that depending on the internal Clifford algebra between the NH Dirac operator and candidate mass order-parameter, the resulting quantum-critical fluid either remains coupled with the environment or recovers full Hermiticity by decoupling from the bath, while always enjoying an emergent Yukawa-Lorentz symmetry in terms of a unique terminal velocity. We showcase the competition between such mass orderings, their hallmarks on quasi-particle spectra in the ordered phases, and the relevance of our findings for correlated designer NH Dirac materials.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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