Proximity induced superconductivity in monolayer CuO$_{2}$ on the cuprate substrates

TL;DR

This paper models how high-temperature superconductivity can be induced in monolayer CuO$_2$ on cuprate substrates through proximity effects, revealing the potential for both nodal and nodeless d-wave states.

Contribution

It introduces a two-band model of hybridized oxygen orbitals to explain proximity-induced superconductivity in monolayer CuO$_2$ on cuprate substrates.

Findings

Both nodal and nodeless d-wave superconducting states can be induced.

The type of superconducting state depends on pairing parameter strengths.

Proximity effect plays a key role in high-temperature superconductivity in this system.

Abstract

To understand the recently observed high temperature superconductivity in the monolayer CuO$_2$ grown on the Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ substrates, we propose a two band model of the hybridized oxygen $p_x$ and $p_y$ orbitals with the proximity effect of the substrate. We demonstrate that both the nodal and nodeless d-wave superconducting states can be induced by the proximity effect, depending on the strengths of the pairing parameters.