Superconductivity in an infinite-layer nickelate superlattice

Wen Xiao; Zhan Yang; Shilin Hu; Yuzhou He; Xiaofei Gao; Junhua Liu; Zhixiong Deng; Yuhao Hong; Long Wei; Lei Wang; Ziyue Shen; Tianyang Wang; Lin Li; Yulin Gan; Kai Chen; Qinghua Zhang; Zhaoliang Liao

doi:10.1038/s41467-024-54660-w

Nature Communications (Nov 2024)

Superconductivity in an infinite-layer nickelate superlattice

Wen Xiao,
Zhan Yang,
Shilin Hu,
Yuzhou He,
Xiaofei Gao,
Junhua Liu,
Zhixiong Deng,
Yuhao Hong,
Long Wei,
Lei Wang,
Ziyue Shen,
Tianyang Wang,
Lin Li,
Yulin Gan,
Kai Chen,
Qinghua Zhang,
Zhaoliang Liao

Affiliations

Wen Xiao: National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China
Zhan Yang: National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China
Shilin Hu: National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China
Yuzhou He: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
Xiaofei Gao: National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China
Junhua Liu: National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China
Zhixiong Deng: National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China
Yuhao Hong: National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China
Long Wei: National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China
Lei Wang: National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China
Ziyue Shen: National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China
Tianyang Wang: National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China
Lin Li: National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China
Yulin Gan: National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China
Kai Chen: National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China
Qinghua Zhang: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
Zhaoliang Liao: National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China

DOI: https://doi.org/10.1038/s41467-024-54660-w
Journal volume & issue: Vol. 15, no. 1
pp. 1 – 9

Abstract

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Abstract Recent observations of superconductivity in infinite-layer nickelates offer insights into high-temperature superconductivity mechanisms. However, defects and dislocations in doped films complicate the realization of superconductivity, limiting current research to superconducting nickelate heterostructures. The lack of research on superconductivity in superlattices composed of ultrathin nickelates severely impedes not only the exploration of the interface effect on superconductivity, but also the utilization of heterostructure engineering for exploring higher superconducting temperature T c. Here, we demonstrated superconducting infinite-layer nickelate superlattices [(Nd0.8Sr0.2NiO2)8/(SrTiO3)2]10 via topotactic reduction. Our study uncovered that only above a critical thickness can high-quality superlattices be achieved, with structural formation dependent on nickelate layer thickness. The superconducting superlattice showed a T c of 12.5 K and a 2D superconducting feature, indirectly indicate the intrinsic superconductivity of infinite-layer nickelates. Our study offers promising avenues for delving into the superconducting mechanism and for exploring multilevel interface engineering of infinite-layer nickelates, thus opening new horizons for the study of infinite-layer nickelates.

Published in Nature Communications

ISSN: 2041-1723 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Science
Website: https://www.nature.com/ncomms/

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