Pressure-induced superconductivity in La$_{4}$Ni$_{3}$O$_{10+\delta}$ ($\delta$ = 0.04 and -0.01)

TL;DR

This study explores how applying high pressure induces superconductivity in La$_{4}$Ni$_{3}$O$_{10+ ext{δ}}$ with different oxygen contents, revealing a maximum transition temperature of 36 K at 48 GPa.

Contribution

It demonstrates pressure-induced superconductivity in La$_{4}$Ni$_{3}$O$_{10+ ext{δ}}$ and identifies the highest $T_{c}$ reported for this material.

Findings

Superconductivity appears under high pressure up to 124.9 GPa.

Maximum $T_{c}$ of 36 K at 48 GPa for La$_{4}$Ni$_{3}$O$_{10.04}$.

$T_{c}$ strongly depends on oxygen content and pressure.

Abstract

The superconducting transition temperatures, $T_{\mathrm{c}}$, of La$_{4}$Ni$_{3}$O$_{10+\delta}$($\delta$ = 0.04 and -0.01) were determined under various pressures up to 124.9 GPa by electrical resistance measurements with a diamond anvil cell. $T_{\mathrm{c}}$ exhibits a strong dependence on oxygen content within the pressure range of approximately 20 GPa and 80 GPa. At 48.0 GPa, $T_{\mathrm{c}}$ of La$_{4}$Ni$_{3}$O$_{10.04}$ peaks at 36 K, marking the highest $T_{\mathrm{c}}$ reported thus far.