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

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Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2019-01-22
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Language
en
Pages
1-5
Series
Physical Review B, Volume 99, issue 4
Abstract
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.
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Moors, K, Zyuzin, A A, Zyuzin, A Y, Tiwari, R P & Schmidt, T L 2019, ' Disorder-driven exceptional lines and Fermi ribbons in tilted nodal-line semimetals ', Physical Review B, vol. 99, no. 4, 041116, pp. 1-5 . https://doi.org/10.1103/PhysRevB.99.041116