Interaction-Induced Metallicity in a Two-Dimensional Disordered Non-Fermi Liquid.

Area of Science:

• Condensed matter physics
• Quantum criticality
• Disordered systems

Background:

• Two-dimensional (2D) electron systems are crucial for understanding condensed matter phenomena.
• The interplay between electron interactions and disorder is a long-standing research area.
• Traditional studies often begin with Fermi liquids, but this work explores a non-Fermi liquid starting point.

Purpose of the Study:

• To investigate the effects of disorder on a clean non-Fermi liquid near a 2D ferromagnetic quantum critical point.
• To determine if a stable, conducting state can emerge under these conditions.
• To contrast the findings with the behavior of disordered Fermi liquids.

Main Methods:

• Theoretical modeling of a 2D electron system.
• Analysis of a non-Fermi liquid state near a quantum critical point.
• Inclusion of disorder effects within the model.

Main Results:

• The proposed model avoids runaway flows to strong coupling, a common issue in disordered systems.
• A marginally stable fixed point is identified.
• The system demonstrates perfect conduction.

Conclusions:

• Disorder can lead to stable, perfectly conducting states in non-Fermi liquids near quantum critical points.
• This approach offers an alternative to studying disordered Fermi liquids.
• The findings provide a new perspective on electron behavior in 2D systems.