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Structural and electronic properties of SrCuO2+ δ thin films

Published inAPL materials, vol. 10, no. 10, 101112
Publication date2022-10-31
First online date2022-10-31
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.

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Citation (ISO format)
HADJIMICHAEL, Marios et al. Structural and electronic properties of SrCuO<sub>2+ δ</sub> thin films. In: APL materials, 2022, vol. 10, n° 10, p. 101112. doi: 10.1063/5.0107320
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ISSN of the journal2166-532X
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Creation10/31/2022 4:44:00 PM
First validation10/31/2022 4:44:00 PM
Update time03/16/2023 8:35:41 AM
Status update03/16/2023 8:35:39 AM
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