Quasiparticle interference and resonant states in normal and superconducting line nodal semimetals

Abstract

We study impurity scattering in the normal and d-wave superconducting states of line nodal semimetals and show that, due to additional scattering phase space available for impurities on the surface, the quasiparticle interference pattern acquires an extended character instead of a discrete collection of delta function peaks. Moreover, using the T-matrix formalism, we demonstrate that the conventional behavior of a scalar impurity in a d-wave superconductor breaks down on the surface of a line nodal semimetal in the quasi flat band limit.

11 pages,7 figures including Supplemental Material

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Cited by in corpus (4)

• Realistic Floquet semimetal with exotic topological linkages between arbitrarily many nodal loops
• Impurity-induced resonant states in topological nodal-line semimetals
• Fragile topology in nodal-line semimetal superconductors
• Probing Sign-Changing Order Parameters via Impurity States in unconventional superconductors: Implications for La${}_3$Ni${}_2$O${}_7$ Superconductors with interlayer pairing