Disorder-induced exceptional points and nodal lines in Dirac superconductors
Alexander A. Zyuzin, Pascal Simon
DOI 10.1103/PhysRevB.99.165145 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We consider the effect of disorder on the spectrum of quasiparticles in the point-node and nodal-line superconductors. Due to the anisotropic dispersion of quasiparticles disorder scattering may render the Hamiltonian describing these excitations non-Hermitian. Depending on the dimensionality of the system, we show that the nodes in the spectrum are replaced by Fermi arcs or Fermi areas bounded by exceptional points or exceptional lines, respectively. These features are illustrated by first considering a model of a proximity-induced superconductor in an anisotropic two-dimensional (2D) Dirac semimetal, where a Fermi arc in the gap bounded by exceptional points can be realized. We next show that the interplay between disorder and supercurrents can give rise to a 2D Fermi surface bounded by exceptional lines in three-dimensional (3D) nodal superconductors.
Similar papers
Disorder-induced exceptional points and nodal lines in Dirac superconductors
similarity 0.95Alexander A. Zyuzin & Pascal Simon · 2019 · arXiv:1901.05047
Source status unknown — claims are unverified
Quasiparticle interference and resonant states in normal and superconducting line nodal semimetals
similarity 0.92Chandan Setty et al.
Source status unknown — claims are unverified
Impurity States and the Absence of Quasiparticle Localization in Disordered d-Wave Superconductors
similarity 0.90A. V. Balatsky & M. I. Salkola
Source status unknown — claims are unverified
Robust accidental nodes and zeros and critical quasiparticle scaling in iron-based multiband superconductors
similarity 0.89Valentin Stanev et al.
Source status unknown — claims are unverified
Nanoscale impurity structures on the surface of dx2−y2-wave superconductors
similarity 0.89Nikolaos A. Stavropoulos & Dirk K. Morr
Source status unknown — claims are unverified
Supercurrent in nodal superconductors
similarity 0.88Igor Khavkine et al.
Source status unknown — claims are unverified