1. Magnetotransport of dirty-limit van Hove singularity quasiparticles
- Author
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Veronica Granata, Jonathan Spring, Simon Gerber, R. Fittipaldi, František Herman, D. Destraz, Andreas Schilling, Antonio Vecchione, Mark H. Fischer, Shiyan Li, Y. Xu, Johan Chang, Jakub Vonka, L. Das, Marta Gibert, Xiaofu Zhang, University of Zurich, and Chang, Johan
- Subjects
530 Physics ,QC1-999 ,Van Hove singularity ,FOS: Physical sciences ,General Physics and Astronomy ,02 engineering and technology ,10192 Physics Institute ,Astrophysics ,01 natural sciences ,symbols.namesake ,chemistry.chemical_compound ,Condensed Matter - Strongly Correlated Electrons ,Condensed Matter::Superconductivity ,0103 physical sciences ,010306 general physics ,Strontium ruthenate ,Physics ,Condensed Matter::Quantum Gases ,Strongly Correlated Electrons (cond-mat.str-el) ,Condensed matter physics ,Fermi level ,021001 nanoscience & nanotechnology ,3100 General Physics and Astronomy ,QB460-466 ,chemistry ,symbols ,Density of states ,Quasiparticle ,Gravitational singularity ,Strongly correlated material ,Condensed Matter::Strongly Correlated Electrons ,Fermi liquid theory ,0210 nano-technology - Abstract
Tuning of electronic density-of-states singularities is a common route to unconventional metal physics. Conceptually, van Hove singularities are realized only in clean two-dimensional systems. Little attention has therefore been given to the disordered (dirty) limit. Here, we provide a magnetotransport study of the dirty metamagnetic system calcium-doped strontium ruthenate. Fermi liquid properties persist across the metamagnetic transition, but with an unusually strong variation of the Kadowaki-Woods ratio. This is revealed by a strong decoupling of inelastic electron scattering and electronic mass inferred from density-of-state probes. We discuss this Fermi liquid behavior in terms of a magnetic field tunable van Hove singularity in the presence of disorder. More generally, we show how dimensionality and disorder control the fate of transport properties across metamagnetic transitions., Communications Physics, 4 (1)
- Published
- 2021
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