Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session OD01: V: On-Demand Presentations - Available throughout March Meeting
6:00 AM,
Sunday, March 3, 2024
Abstract: OD01.00062 : Towards an alternative approach to achieve superconducting infinite-layer nickelate thin films*
Presenter:
Dongxin ZHANG
(Unité Mixte de Physique CNRS/Thales)
Authors:
Dongxin ZHANG
(Unité Mixte de Physique CNRS/Thales)
Araceli Gutiérrez-Llorente
(Unite Mixte de Physique CNRS/Thales)
Aravind Raji
(Laboratoire de Physique des Solides)
Luis Moreno
(CNRS/THALES)
Laurent Divay
(Thales)
Christophe Galindo
(Thales)
Alexandre Gloter
(Laboraotire de Physique des Solides)
Manuel Bibes
(CNRS/THALES)
Lucía Iglesias
(Unité Mixte de Physique CNRS/Thales)
The recent discovery of superconductivity in the family of hole-doped infinite-layer nickelates (Nd1-xSrxNiO2, x=dopant concentration) has given rise to an entirely new realm of research [1]. The superconducting phase is obtained after selectively removing all the apical oxygens from the perovskite phase by means of a complex chemical topotactic reduction using CaH2 as a reducing agent [2]. This method prone to irreproducibility issues, which is hindering the development of the field. However, very recently, Wei et al. [3] reported superconductivity in Nd0.75Eu0.25NiO2 infinite-layer phase by using an Al layer as an oxygen scavenger.
In this work, we will present the whole optimization process of Pr0.80Sr0.20NiO3 thin films grown on STO (001) substrates to obtain the infinite-layer phase of nickelates by using Al sputtering deposition. In addition, we will discuss the key parameters for stabilizing the perovskite phase and the infinite-layer phase, comparing samples reduced by the two methods. Our findings could help in the development of a more reliable and reproducible method to attain superconducting infinite-layer samples.
References:
[1] D. Li et al., Nature 572 (2019) 624.
[2] K. Lee et al., APL Materials 8 (2020) 041107.
[3] W. Wei et al., Science Advances 9 (27) (2023) eadh3327.
*Ecole doctorale Physique en île-de-France et Université Paris Saclay.
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