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Emergence of nodal Bogoliubov quasiparticles across the transition from the pseudogap metal to the *d*-wave superconductor

Physics

Emergence of nodal Bogoliubov quasiparticles across the transition from the pseudogap metal to the *d*-wave superconductor

M. Christos and S. Sachdev

Discover the intriguing world of superconductivity as Maine Christos and Subir Sachdev explore the pseudogap state in cuprates. Their innovative approach reveals the emergence of gapless Bogoliubov quasiparticles, unveiling even in electron-doped scenarios. This groundbreaking research reshapes our understanding of *d*-wave superconductivity and Higgs boson condensation.

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Playback language: English
Abstract
We model the pseudogap state of the hole- and electron-doped cuprates as a metal with hole and/or electron pocket Fermi surfaces. Using the Ancilla theory, we describe the onset of conventional *d*-wave superconductivity by the condensation of a charge *e* Higgs boson. In all cases, the *d*-wave superconductor has gapless Bogoliubov quasiparticles at 4 nodal points with velocity anisotropy. Remarkably, even in electron-doped cases with only electron pockets and an electronic gap along zone diagonals, gapless nodal Bogoliubov quasiparticles emerge upon superconductivity onset.
Publisher
npj Quantum Materials
Published On
Jan 05, 2024
Authors
Maine Christos, Subir Sachdev
Tags
pseudogap state
cuprates
d-wave superconductivity
Higgs boson
Bogoliubov quasiparticles
electron pockets
velocity anisotropy

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