Preparation and superconductivity of iron selenide thin films

TL;DR

This study reports the successful preparation of epitaxial iron selenide thin films on various substrates using pulsed laser deposition, demonstrating their superconducting properties with critical temperatures up to 11.8 K.

Contribution

It introduces a method to produce high-quality FeSe thin films with superconductivity, expanding the potential for their application in electronic devices.

Findings

FeSe thin films are epitaxially grown on multiple substrates.

The films exhibit superconductivity with Tc up to 11.8 K.

The upper critical magnetic field is estimated at 14.0 T.

Abstract

FeSex (x = 0.80, 0.84, 0.88, 0.92) thin films were prepared on SrTiO3(001) (STO), (La,Sr)(Al,Ta)O3(001) (LSAT), and LaAlO3(001) (LAO) substrates by pulsed laser deposition method. All thin films show single-phase and c-axis oriented epitaxial growth, and are superconducting. Among them, the FeSe0.88 thin films show Tc, onset of 11.8 K and Tc, 0 of 3.4 K. The upper critical magnetic field is estimated to be 14.0 T.