Magnetic excitations in strained infinite-layer nickelate PrNiO2 films

Qiang Gao, Shiyu Fan, Qisi Wang, Jiarui Li, Xiaolin Ren, Izabela Biało, Annabella Drewanowski, Pascal Rothenbühler, Jaewon Choi, Ronny Sutarto, Yao Wang, Tao Xiang, Jiangping Hu, Ke-Jin Zhou, Valentina Bisogni, Riccardo Comin, J. Chang (), Jonathan Pelliciari (), X. J. Zhou () and Zhihai Zhu ()
Additional contact information
Qiang Gao: Chinese Academy of Sciences
Shiyu Fan: Upton
Qisi Wang: Universität Zürich
Jiarui Li: Massachusetts Institute of Technology
Xiaolin Ren: Chinese Academy of Sciences
Izabela Biało: Universität Zürich
Annabella Drewanowski: Universität Zürich
Pascal Rothenbühler: Universität Zürich
Ronny Sutarto: Canadian Light Source
Yao Wang: Clemson University
Tao Xiang: Chinese Academy of Sciences
Jiangping Hu: Chinese Academy of Sciences
Ke-Jin Zhou: Harwell Campus
Valentina Bisogni: Upton
Riccardo Comin: Massachusetts Institute of Technology
J. Chang: Universität Zürich
Jonathan Pelliciari: Upton
X. J. Zhou: Chinese Academy of Sciences
Zhihai Zhu: Chinese Academy of Sciences

Nature Communications, 2024, vol. 15, issue 1, 1-7

Abstract: Abstract Strongly correlated materials respond sensitively to external perturbations such as strain, pressure, and doping. In the recently discovered superconducting infinite-layer nickelates, the superconducting transition temperature can be enhanced via only ~ 1% compressive strain-tuning with the root of such enhancement still being elusive. Using resonant inelastic x-ray scattering (RIXS), we investigate the magnetic excitations in infinite-layer PrNiO2 thin films grown on two different substrates, namely SrTiO3 (STO) and (LaAlO3)0.3(Sr2TaAlO6)0.7 (LSAT) enforcing different strain on the nickelates films. The magnon bandwidth of PrNiO2 shows only marginal response to strain-tuning, in sharp contrast to the enhancement of the superconducting transition temperature Tc in the doped superconducting samples. These results suggest the bandwidth of spin excitations of the parent compounds is similar under strain while Tc in the doped ones is not, and thus provide important empirics for the understanding of superconductivity in infinite-layer nickelates.

Date: 2024
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DOI: 10.1038/s41467-024-49940-4

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