Tuning the Fermi liquid crossover in Sr2RuO4 with uniaxial stress
- Chronister, A.
- Zingl, M.
- Pustogow, A.
- Luo, Yongkang
- Sokolov, D.
- Jerzembeck, F.
- Kikugawa, N.
- Hicks, C.
- Mravlje, J.
- Bauer, E.
- Thompson, J.
- Mackenzie, A.
- Georges, A.
- Brown, S.
DOIAbstract
International audienceWe 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 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
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