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Are Heavy Fermion Strange Metals Planckian?
Mathieu Taupin1, Silke Paschen1
1Institute of Solid State Physics, Vienna University of Technology, Wiedner Hauptstr. 8-10, 1040 Vienna, Austria; taupin@ifp.tuwien.ac.at.
Crystals
|August 1, 2022
Summary
Strange metal behavior in heavy fermion compounds shows weaker than Planckian scattering. This suggests other mechanisms drive the linear temperature dependence of resistivity in these strongly correlated systems.
Area of Science:
- Condensed matter physics
- Quantum materials science
Background:
- Strange metal behavior, characterized by linear temperature dependence of electrical resistivity, is observed in various strongly correlated electron systems.
- This phenomenon is often linked to unconventional superconductivity, presenting a major challenge for unified theoretical understanding.
Purpose of the Study:
- To investigate the role of Planckian dissipation in strange metal heavy fermion compounds.
- To determine if Planckian scattering can explain the observed linear-in-temperature resistivity in these materials.
Main Methods:
- Analysis of heavy fermion compounds exhibiting extreme correlation strength.
- Application of a Drude conductivity model with Planckian scattering rate to strongly renormalized quasiparticles.
Main Results:
- Scattering rates in strange metal heavy fermion compounds were found to be significantly weaker than Planckian.
- The study indicates that Planckian dissipation is unlikely to be the sole cause of the linear resistivity.
Conclusions:
- The linear temperature dependence in strange metal heavy fermion compounds likely arises from mechanisms other than Planckian dissipation.
- Further research is needed to explore alternative explanations for this enigmatic behavior in strongly correlated systems.
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