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arXiv · 2208.05614

Magnetic Excitations in Strained Infinite-layer Nickelate PrNiO2

Qiang Gao·Shiyu Fan·Qisi Wang·Jiarui Li·Xiaolin Ren·Izabela Biało·Annabella Drewanowski·Pascal Rothenbühler·Jaewon Choi·Yao Wang·Tao Xiang·Jiangping Hu·Ke-Jin Zhou·Valentina Bisogni·Riccardo Comin·J. Chang·Jonathan Pelliciari·X. J. Zhou·Zhihai Zhu
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Abstract

Strongly correlated materials often respond sensitively to the external perturbations. In the recently discovered superconducting infinite-layer nickelates, the superconducting transition temperature can be dramatically enhanced via only ~1% compressive strain-tuning enabled by substrate design. However, the root of such enhancement remains elusive. While the superconducting pairing mechanism is still not settled, magnetic Cooper pairing - similar to the cuprates has been proposed. Using resonant inelastic x-ray scattering, we investigate the magnetic excitations in infinite-layer PrNiO2 thin films for different strain conditions. The magnon bandwidth of PrNiO2 shows only marginal response to strain-tuning, in sharp contrast to the striking enhancement of the superconducting transition temperature Tc in the doped superconducting samples. These results suggest the enhancement of Tc is not mediated by spin excitations and thus provide important empirics for the understanding of superconductivity in infinite-layer nickelates.

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Qiang Gao, Shiyu Fan, Qisi Wang, Jiarui Li, Xiaolin Ren, Izabela Biało, Annabella Drewanowski, Pascal Rothenbühler, Jaewon Choi, Yao Wang, Tao Xiang, Jiangping Hu, Ke-Jin Zhou, Valentina Bisogni, Riccardo Comin, J. Chang, Jonathan Pelliciari, X. J. Zhou, Zhihai Zhu. 2022-08-11. Magnetic Excitations in Strained Infinite-layer Nickelate PrNiO2. https://arxiv.org/abs/2208.05614

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