Electronic structure of topological defects in the pair density wave superconductor

Marcus Rosales, Eduardo Fradkin

Research output: Contribution to journalArticlepeer-review

Abstract

Pair density waves (PDWs) are a inhomogeneous superconducting states whose Cooper pairs possess a finite momentum resulting in a oscillatory gap in space, even in the absence of an external magnetic field. There is growing evidence for the existence of PDW superconducting order in many strongly correlated materials, particularly in the cuprate superconductors and in several other different types of systems. A feature of the PDW state is that inherently it has a CDW as a composite order associated with it. Here we study the structure of the electronic topological defects of the PDW, paying special attention to the half-vortex and its electronic structure that can be detected in STM experiments. We discuss tell-Tale signatures of the defects in violations of inversion symmetry, in the excitation spectrum and their spectral functions in the presence of topological defects. We discuss the "Fermi surface"topology of Bogoliubov quasiparticle of the PDW phases, and we briefly discuss the role of quasiparticle interference.

Original languageEnglish (US)
Article number214508
JournalPhysical Review B
Volume110
Issue number21
DOIs
StatePublished - Dec 1 2024
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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