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Updated: Dec 17, 2025
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
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Multiband Quantum Criticality of Polar Metals
Pavel A Volkov1,2, Premala Chandra1,2
1Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA.
Physical Review Letters
|July 1, 2020
Summary
Researchers explored strong correlations in polar metals by tuning the polar transition temperature to zero. They discovered novel interacting phases, like non-Fermi liquids, with potential experimental signatures.
Area of Science:
- Condensed Matter Physics
- Materials Science
Background:
- Recent experiments realized polar metals with broken inversion symmetry.
- Tuning the polar transition temperature to zero is a key experimental frontier.
Purpose of the Study:
- Explore strong correlations driven by criticality in polar metals at zero transition temperature.
- Investigate the coupling between critical fluctuations and electrons in multiband systems.
- Identify and characterize novel interacting electronic phases and their experimental signatures.
Main Methods:
- Theoretical modeling of multiband metals near a polar quantum critical point.
- Analysis of electron-critical mode coupling.
- Characterization of emergent electronic phases.
Main Results:
- Demonstrated a robust mechanism for electron-critical mode coupling, overcoming prior challenges.
- Identified novel interacting phases, including non-Fermi liquids, particularly when band crossings are near the Fermi level.
- Characterized distinct experimental signatures for three generic types of band crossings.
Conclusions:
- Criticality in polar metals provides a route to strong electronic correlations and novel quantum phases.
- The identified non-Fermi liquid states and their signatures offer promising avenues for experimental verification.
- This work provides a theoretical framework for understanding and discovering new correlated electron phenomena in broken-symmetry materials.
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