Optical and acoustic plasmons in the layered material Sr₂RuO₄.

ABSTRACT: The perfect linear temperature dependence of the electrical resistivity in a variety of "strange" metals is a real puzzle in condensed matter physics. For these materials also other non-Fermi liquid properties are predicted or detected. In particular we mention the results derived from holographic theories which conclude that plasmons should be overdamped due to a low energy continuum in the electronic susceptibility. These predictions were supported by electron energy-loss spectroscopy in reflection on cuprates and ruthenates. Here we use electron energy-loss spectroscopy in transmission to study collective charge excitations in the layer metal Sr₂RuO₄. This metal has a transition from a perfect Fermi liquid below T ≈ 30 K into a "strange" metal phase above T ≈ 800 K

SUBMITTER: Schultz J 

PROVIDER: S-EPMC12062453 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature