Pairing instability near a lattice-influenced nematic quantum critical point

Abstract

We study how superconducting Tc is affected as an electronic system in a tetragonal environment is tuned to a nematic quantum critical point (QCP). Including coupling of the electronic nematic variable to the relevant lattice strain restricts criticality only to certain high symmetry directions. This allows a weak-coupling treatment, even at the QCP. We develop a criterion distinguishing weak and strong Tc enhancements upon approaching the QCP. We show that negligible Tc enhancement occurs only if pairing is dominated by a non-nematic interaction away from the QCP, and simultaneously if the electron-strain coupling is sufficiently strong. We argue this is the case of the iron superconductors.

7 pages, 4 figures

References in corpus (3)

• Enhancement of superconductivity near a nematic quantum critical point
• Are non-Fermi-liquids stable to Cooper pairing?
• Non-Fermi liquid behavior of electrical resistivity close to the nematic critical point in Fe${}_{1-x}$Co${}_x$Se and FeSe${}_{1-y}$S${}_y$

Cited by in corpus (30)

• Quenched nematic criticality separating two superconducting domes in an iron-based superconductor under pressure
• Nematic Fluctuations in the Cuprate Superconductor Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Electronic nematic states tuned by isoelectronic substitution in bulk FeSe1-xSx
• Strain-tuning of nematicity and superconductivity in single crystals of FeSe
• Pure nematic quantum critical point accompanied by a superconducting dome
• Elastocaloric signature of nematic fluctuations
• Anomalous high-magnetic field electronic state of the nematic superconductors FeSe${}_{1-x}$S${}_x$
• Resistivity near a nematic quantum critical point: Impact of acoustic phonons
• Collapse of critical nematic fluctuations in FeSe under pressure
• Evolution of the nematic susceptibility in LaFe${}_{1-x}$Co${}_x$AsO
• Enhanced superconducting pairing strength near a nonmagnetic nematic quantum critical point
• Nematic correlation length in iron-based superconductors probed by inelastic x-ray scattering
• High Tc superconductivity in CaKFe${}_4$As${}_4$ in absence of nematic fluctuations
• Lattice-Shifted Nematic Quantum Critical Point in FeSe${}_{1-x}$S${}_x$
• DC resistivity near a nematic quantum critical point: Effects of weak disorder and acoustic phonons
• Tests of nematic-mediated superconductivity applied to Ba${}_{1-x}$Sr${}_x$Ni${}_2$As${}_2$
• Phonon-induced rotation of the electronic nematic director in superconducting Bi${}_2$Se${}_3$
• Resurgence of superconductivity and the role of $d_{xy}$ hole band in FeSe${}_{1-x}$Te${}_x$
• Growth of nematic susceptibility in the field-induced normal state of an iron-based superconductor revealed by elastoresistivity measurements in a 65 T pulsed magnet
• Superconducting gap and nematic resonance at the quantum critical point observed by Raman scattering in $\mathrm{BaF}{\mathrm{e}}_2({\mathrm{As}}_{1-x}{\mathrm{P}}_x{)}_2$
• Uniaxial stress effect on the electronic structure of quantum materials
• Variation of shear moduli across superconducting phase transitions
• Mapping out the spin fluctuations in Co-doped LaFeAsO single crystals by NMR
• Elastoresistivity of heavily hole doped 122 iron pnictides superconductors
• Microscopic origin of the nemato-elastic coupling and dynamics of hybridized collective nematic-phonon excitations
• Superconductivity near a nematoelastic quantum critical point
• Studies of superconductivity of Fe chalcogenides in films grown by PLD technique
• Nematic fluctuations mediated superconductivity revealed by anisotropic strain in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Superconductivity near an Ising nematic quantum critical point in two dimensions
• Fragile pressure-induced magnetism in FeSe superconductors with a thickness reduction