UNIGE document Scientific Article
previous document  unige:164517  next document
add to browser collection
Title

Structural and electronic properties of SrCuO2+ δ thin films

Authors
De Luca, Gabriele
Herrero-Martín, Javier
Gibert, Marta
show hidden authors show all authors [1 - 9]
Published in APL materials. 2022, vol. 10, no. 10, 101112
Abstract

The layered structure of superconducting cuprates is considered to be a key ingredient to achieve high superconducting transition temperatures. In this work, we investigate the possibility of doping the SrCuO 2 infinite-layer compound by inserting additional oxygen into its structure. We observe that the infinite-layer SrCuO 2 structure is epitaxially stabilized in thin films grown by pulsed laser deposition in pure O 2 . Increasing the oxidizing power by introducing ozone during the growth leads to a different phase with an elongated c axis. Scanning transmission electron microscopy analysis suggests that the films with an elongated c axis are composed of SrCuO 2.5 blocks separated by SrCuO 2 layers arranged to match the substrate spacing. X-ray absorption spectroscopy measurements show that this SrCuO 2+ δ phase is associated with a more isotropic Cu orbital configuration and hole doping. This hole doping leads to a dramatic reduction in the resistivity of the films, with a magnitude that depends on the precise oxygen content in the structure.

Identifiers
Full text
Structures
Research group Groupe Triscone
Projects
European Commission: Q-MAC
Swiss National Science Foundation: 200020_179155
Citation
(ISO format)
HADJIMICHAEL, Marios et al. Structural and electronic properties of SrCuO2+ δ thin films. In: APL materials, 2022, vol. 10, n° 10, p. 101112. doi: 10.1063/5.0107320 https://archive-ouverte.unige.ch/unige:164517

38 hits

10 downloads

Update

Deposited on : 2022-11-01

Export document
Format :
Citation style :