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Tuning the Fermi liquid crossover in Sr2RuO4 with uniaxial stress

https://doi.org/10.1038/s41535-022-00519-6

Chronister, A; Zingl, M; Pustogow, A; Luo, Yongkang; Sokolov, D A; Jerzembeck, F; Kikugawa, N; Hicks, C W; Mravlje, J; Bauer, E D; et al (December 2022, npj Quantum Materials)

Abstract 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.
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Constraints on the superconducting order parameter in Sr2RuO4 from oxygen-17 nuclear magnetic resonance

https://doi.org/10.1038/s41586-019-1596-2

Pustogow, A.; Luo, Yongkang; Chronister, A.; Su, Y.-S.; Sokolov, D. A.; Jerzembeck, F.; Mackenzie, A. P.; Hicks, C. W.; Kikugawa, N.; Raghu, S.; et al (October 2019, Nature)

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Nematicity in the superconducting mixed state of strain detwinned underdoped Ba( ${Fe}_{1 - x} {Co}_{x})_{2} {As}_{2}$

https://doi.org/10.1103/PhysRevB.99.064515

Schmidt, J.; Bekeris, V.; Lozano, G. S.; Bortulé, M. V.; Bermúdez, M. Marziali; Hicks, C. W.; Canfield, P. C.; Fradkin, E.; Pasquini, G. (February 2019, Physical Review B)
Normal State ${}^{17}O$ NMR Studies of ${Sr}_{2} {RuO}_{4}$ under Uniaxial Stress

https://doi.org/10.1103/PhysRevX.9.021044

Luo, Yongkang; Pustogow, A.; Guzman, P.; Dioguardi, A. P.; Thomas, S. M.; Ronning, F.; Kikugawa, N.; Sokolov, D. A.; Jerzembeck, F.; Mackenzie, A. P.; et al (May 2019, Physical Review X)

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