Anomalous doping evolution of superconductivity and quasiparticle interference in Bi2Sr2Ca2Cu3O10+{\delta} trilayer cuprates

TL;DR

This study uses scanning tunneling microscopy to explore how superconductivity and quasiparticle interference evolve anomalously with doping in trilayer cuprates, revealing unique behaviors compared to single- and double-layer compounds.

Contribution

It uncovers the doping-dependent behavior of two distinct superconducting gaps and quasiparticle interference in trilayer cuprates, highlighting the role of inequivalent CuO2 planes.

Findings

Superconducting gaps decrease rapidly with doping in trilayer cuprates.

Quasiparticle interference is absent in the antinodal region of overdoped samples.

Distinct behaviors contrast with single- and double-layer compounds.

Abstract

We use scanning tunneling microscopy to investigate Bi2Sr2Ca2Cu3O10+{\delta} trilayer cuprates from the optimally doped to overdoped regime. We find that the two distinct superconducting gaps from the inner and outer CuO2 planes both decrease rapidly with doping, in sharp contrast to the nearly constant Tc. Spectroscopic imaging reveals the absence of quasiparticle interference in the antinodal region of overdoped samples, showing an opposite trend to that in single- and double-layer compounds. We propose that the existence of two types of inequivalent CuO2 planes and the intricate interaction between them are responsible for these highly anomalous observations in trilayer cuprates.