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arXiv · 2111.05570

Tuning the Fermi Liquid Crossover in Sr$_2$RuO$_4$ with Uniaxial Stress

Aaron Chronister·Manuel Zingl·Andrej Pustogow·Yongkang Luo·Dmitry Sokolov·Naoki Kikugawa·Clifford Hicks·Fabian Jerzembeck·Jernei Mravlje·Eric Bauer·Andrew Mackenzie·Antoine Georges·Stuart Brown
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Abstract

We perform nuclear magnetic resonance (NMR) measurements of the oxygen-17 Knight shifts for Sr$_2$RuO$_4$, 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.

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Aaron Chronister, Manuel Zingl, Andrej Pustogow, Yongkang Luo, Dmitry Sokolov, Naoki Kikugawa, Clifford Hicks, Fabian Jerzembeck, Jernei Mravlje, Eric Bauer, Andrew Mackenzie, Antoine Georges, Stuart Brown. 2021-11-10. Tuning the Fermi Liquid Crossover in Sr$_2$RuO$_4$ with Uniaxial Stress. https://arxiv.org/abs/2111.05570

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