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Tuning the Fermi liquid crossover in Sr2RuO4 with uniaxial stress
npj Quantum Materials ( IF 5.7 ) Pub Date : 2022-12-02 , DOI: 10.1038/s41535-022-00519-6
A. Chronister, M. Zingl, A. Pustogow, Yongkang Luo, D. A. Sokolov, F. Jerzembeck, N. Kikugawa, C. W. Hicks, J. Mravlje, E. D. Bauer, J. D. Thompson, A. P. Mackenzie, A. Georges, S. E. Brown

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 quasiparticle 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.



中文翻译:

用单轴应力调整 Sr2RuO4 中的费米液体交叉

我们对 Sr 2 RuO 4的氧 17 骑士位移进行核磁共振 (NMR) 测量,同时受到沿 [100] 方向施加的单轴应力。由此产生的应变与推断的磁响应的温度和磁场依赖性的强烈变化有关。基于密度泛函理论计算的准粒子描述,辅以多体重整化,被发现重现了我们的实验结果,并突出了范霍夫奇点的关键作用。费米-液体相干标度显示可通过应变进行调谐,并随着接近相关的 Lifshitz 跃迁而驱动至低值。

更新日期:2022-12-02
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