Quasiparticle Scattering in a Superconductor near a Nematic Critical Point: Resonance Mode and Multiple Attractive Channels

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Abstract

We analyze the scattering rate for 2D fermions interacting via soft nematic fluctuations. The ground state is an s-wave superconductor, but other pairing channels are almost equally attractive. This strongly alters the scattering rate: At energies beyond the pairing gap Δ, it is renormalized by contributions from all pairing channels. At energies of order Δ, it is determined by the competition between scattering into a gapped continuum and dispersing nematic resonance. The outcome is a “peak-peak-dip-hump” spectrum, similar, but not identical, to the “peak-dip-hump” structure in the cuprates.

Original languageEnglish (US)
Article number017001
JournalPhysical review letters
Volume128
Issue number1
DOIs
StatePublished - Jan 7 2022

Bibliographical note

Funding Information:
The work by A. V. C. was supported by the Office of Basic Energy Sciences, U.S. Department of Energy, under Award No. DE-SC0014402. A. K. was supported by NSF Grant No. DMR-2037654.

Publisher Copyright:
© 2022 American Physical Society

PubMed: MeSH publication types

  • Journal Article

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