Multiband Quantum Criticality of Polar Metals

Abstract

Motivated by recent experimental realizations of polar metals with broken inversion symmetry, we explore the emergence of strong correlations driven by criticality when the polar transition temperature is tuned to zero. Overcoming previously discussed challenges, we demonstrate a robust mechanism for coupling between the critical mode and electrons in multiband metals. We identify and characterize several novel interacting phases, including non-Fermi liquids, when band crossings are close to the Fermi level and present their experimental signatures for three generic types of band crossings.

References in corpus (9)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Discovery of Weyl fermion semimetals and topological Fermi arc states
• Graphene integer quantum Hall effect in the ferromagnetic and paramagnetic regimes
• Tuning the ferro- to para-electric transition temperature and dipole orientation of group-IV monochalcogenide monolayers
• Critical enhancement of thermopower in a chemically tuned polar semimetal MoTe${}_2$
• Giant negative magnetoresistance driven by spin-orbit coupling at the LAO/STO interface
• Dynamic current-current susceptibility in 3D Dirac and Weyl semimetals
• Nematic and chiral superconductivity induced by odd-parity fluctuations
• Reply to Comment on "Superconductivity at low density near a ferroelectric quantum critical point: doped SrTiO_3"

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• Synergetic ferroelectricity and superconductivity in zero-density Dirac semimetals near quantum criticality
• "Quantum bipolaron" superconductivity from quadratic electron-phonon coupling
• Spin-Phonon Resonances in Nearly Polar Metals with Spin-Orbit Coupling
• Coupled magnetic and structural phase transitions in the antiferromagnetic polar metal Pb2CoOsO6 under pressure
• Spin-dependent anisotropic electron-phonon coupling in KTaO${}_3$
• Unconventional superconductivity from electronic dipole fluctuations