The Zinc Doping Induced STM Resonance as a Zero Mode

TL;DR

This paper demonstrates that Zinc doping in high-Tc cuprates creates a zero-energy resonance, interpreted as a d-wave monomer confined to the opposite sublattice, linked to the superconducting peak observed in ARPES.

Contribution

It proposes that the Zinc-induced STM resonance is a zero mode related to the superconducting peak, providing a new interpretation of impurity states in cuprates.

Findings

Zinc doping induces a zero-energy resonance in high-Tc cuprates.

The resonance is a d-wave monomer confined to the opposite sublattice.

Resonance vanishes in single-layer $BSCCO_{2201}$ and vortex cores where ARPES peak is absent.

Abstract

We show that the Zinc doping induced STM resonance in high-Tc cuprates is a zero mode - a d-wave monomer confined in the opposite sublattice of the Zinc site. We propose that the resonance come from the superconducting peak around $(\pi,0) $ as observed in ARPES experiments. It is predicted that the resonance should vanish in single layer $BSCCO_{2201}$ or in the vortex core of underdoped cuprate where the ARPES peak is absent. We argue that the STM result imply the ARPES peak around $(\pi,0) $ is the only coherent feature in the whole Brillouin zone.