Disorder-driven exceptional lines and Fermi ribbons in tilted nodal-line semimetals

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

  • Kristof Moors
  • Alexander Zyuzin

  • Alexander Yu Zyuzin
  • Rakesh P. Tiwari
  • Thomas L. Schmidt

Organisaatiot

  • University of Luxembourg
  • RAS - Ioffe Physico Technical Institute
  • McGill University

Kuvaus

We consider the impact of disorder on the spectrum of three-dimensional nodal-line semimetals. We show that the combination of disorder and a tilted spectrum naturally leads to a non-Hermitian self-energy contribution that can split a nodal line into a pair of exceptional lines. These exceptional lines form the boundary of an open and orientable bulk Fermi ribbon in reciprocal space on which the energy gap vanishes. We find that the orientation and shape of such a disorder-induced bulk Fermi ribbon is controlled by the tilt direction and the disorder properties, which can also be exploited to realize a twisted bulk Fermi ribbon with nontrivial winding number. Our results put forward a paradigm for the exploration of non-Hermitian topological phases of matter.

Yksityiskohdat

AlkuperäiskieliEnglanti
Artikkeli041116
Sivut1-5
JulkaisuPhysical Review B
Vuosikerta99
Numero4
TilaJulkaistu - 22 tammikuuta 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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