Stabilization of Fermi Liquid Behavior by Interactions in Disordered Metals

Area of Science:

• Condensed matter physics
• Quantum mechanics
• Materials science

Background:

• Correlated Fermi liquids exhibit complex scattering phenomena.
• Understanding electron-electron and electron-disorder scattering is crucial for material properties.
• Matthiessen's rule often fails in strongly correlated systems.

Purpose of the Study:

• Investigate the interplay between electron-electron and electron-disorder scattering.
• Explain violations of Matthiessen's rule in disordered correlated Fermi liquids.
• Provide theoretical insights into experimental observations in correlated metals.

Main Methods:

• Utilized the disordered Hubbard model.
• Employed dynamical mean-field theory (DMFT).
• Implemented an IPT-CPA (Interacting Paramagnetic-Coherent Potential Approximation) solver.

Main Results:

• Observed significant violations of Matthiessen's rule.
• Demonstrated that interactions screen disorder potentials, protecting inelastic scattering rates.
• Found that high disorder can enhance electron-electron scattering, contrary to elastic scattering behavior.

Conclusions:

• The interplay of interactions and disorder leads to non-additive scattering effects.
• Results align with resistivity data from correlated organic metals (e.g., κ-(ET)2X).
• The findings rationalize sample-dependent T^2 coefficients in perovskite oxides (e.g., SrVO3).