We perform nuclear magnetic resonance (NMR) measurements of the oxygen-17 Knight shifts for Sr2RuO4, while subjected to uniaxial stress applied along [100] direction. The resulting strain is associated with a strong variation of the temperature and magnetic field dependence of the inferred magnetic response. A quasi-particle description based on density-functional theory calculations, supplemented by many-body renormalizations, is found to reproduce our experimental results, and highlights the key role of a van-Hove singularity. The Fermi liquid coherence scale is shown to be tunable by strain, and driven to low values as the associated Lifshitz transition is approached.
@article{arxiv.2111.05570,
title = {Tuning the Fermi Liquid Crossover in Sr$_2$RuO$_4$ with Uniaxial Stress},
author = {Aaron Chronister and Manuel Zingl and Andrej Pustogow and Yongkang Luo and Dmitry Sokolov and Naoki Kikugawa and Clifford Hicks and Fabian Jerzembeck and Jernei Mravlje and Eric Bauer and Andrew Mackenzie and Antoine Georges and Stuart Brown},
journal= {arXiv preprint arXiv:2111.05570},
year = {2022}
}