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.

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Cited by in corpus (11)

• Quasiparticle and Nonquasiparticle Transport in Doped Quantum Paraelectrics
• Superconductivity from energy fluctuations in dilute quantum critical polar metals
• Theory of superconductivity mediated by Rashba coupling in incipient ferroelectrics
• Theory of superconductivity in doped quantum paraelectrics
• Generalized Rashba Electron-Phonon Coupling and Superconductivity in Strontium Titanate
• 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