Correlated pressure effects on structure and superconductivity in LaFeAsO0.9F0.1

TL;DR

This study investigates how high pressure affects the structure and superconductivity of LaFeAsO0.9F0.1, revealing a linear decrease in transition temperature and providing insights into its compressibility and overdoped behavior.

Contribution

It provides the first detailed analysis of pressure effects on LaFeAsO0.9F0.1's structure and superconductivity using synchrotron radiation and diamond anvil cells.

Findings

Bulk modulus of 78 GPa at ambient pressure

Superconducting transition temperature decreases linearly with pressure

Compressibility comparable to cuprates

Abstract

We have studied the structural and superconductivity properties of the compound LaFeAsO0.9F0.1 under pressures up to 32GPa using synchrotron radiation and diamond anvil cells. We obtain an ambient pressure bulk modulus K_0 = 78(2)GPa, compressibility comparable to some cuprates. At high pressures, the sample is in the overdoped region, with a linear decrease with pressure variation of the superconducting transition temperature.