Heavy anion solvation of polarity fluctuations in Pnictides

Abstract

Once again the condensed matter world has been surprised by the discovery of yet another class of high temperature superconductors. The discovery of iron-pnictide (FeAs) and chalcogenide (FeSe) based superconductors with a $T_c$ of up to 55 K is again evidence of how complex the many body problem really is, or in another view how resourceful nature is. The first reactions would of course be that these new materials must in some way be related to the copper-oxide based superconductors for which a large number of theories exist although a general consensus regarding the correct theory has not yet been reached. Here we point out that the basic physical paradigm of the new iron based superconductors is entirely different from the cuprates. Their fundamental properties, structural and electronic, are dominated by the exceptionally large pnictide polarizabilities.

References in corpus (21)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
• Superconductivity at 43 K in Samarium-arsenide Oxides $SmFeAs{O}_{1-x}{F}_x$
• LaFeAsO${}_{1-x}$F${}_x$: A low carrier density superconductor near itinerant magnetism
• Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO${}_{1-x}$F${}_x$FeAs
• Structural and magnetic phase diagram of CeFeAsO1-xFx and its relationship to high-temperature superconductivity
• Superconductivity and Phase Diagram in the Iron-based Arsenic-oxides ReFeAsO1-delta (Re = rare earth metal) without F-Doping
• Superconductivity in iron-based F-doped layered quaternary compound Nd[O1-xFx]FeAs
• Is LaO${}_{1-x}$F${}_x$FeAs an electron-phonon superconductor ?
• Superconductivity at 25 K in hole doped $(L{a}_{1-x}S{r}_x)OFeAs$
• Correlated electronic structure of LaOFeAs
• Coherence-incoherence crossover in the normal state of iron-oxypnictides and importance of the Hund's rule coupling
• Electron-Hole Symmetry and Magnetic Coupling in Antiferromagnetic LaOFeAs
• Commensurate Spin Density Wave in LaOFeAs: A Local Probe Study
• Doping-dependent Phase Diagram of LaO{\it M}As ({\it M}=V--Cu) and Electron-type Superconductivity near Ferromagnetic Instability
• Superconductivity at 36 K in Gadolinium-arsenide Oxides GdO${}_{1-x}$F${}_x$FeAs
• Lattice and Magnetic structures of PrFeAsO, PrFeAsO0.85F0.15 and PrFeAsO0.85
• Nickel-based phosphide superconductor with infinite-layer structure, BaNi2P2
• Nickel-based layered superconductor, LaNiOAs
• High pressure synthesis of late rare earth RFeAs(O,F) superconductors; R = Tb and Dy
• Mott State and Quantum Critical Points in Rare-Earth Oxypnictides $R{O}_{1-x}{F}_{x}FeAs$ ($R=La,Sm,Nd,Pr,Ce$)

Cited by in corpus (32)

• Superconductivity in Iron Compounds
• Gap symmetry and structure of Fe-based superconductors
• Comparison of Ab initio Low-Energy Models for LaFePO, LaFeAsO, BaFe2As2, LiFeAs, FeSe and FeTe: Electron Correlation and Covalency
• Evidence for weak electronic correlations in Fe-pnictides
• Unified Picture for Magnetic Correlations in Iron-Based Superconductors
• On the multi-orbital band structure and itinerant magnetism of iron-based superconductors
• Electronic structure of Fe1.04(Te0.66Se0.34)
• Valley density-wave and multiband superconductivity in Fe-pnictides
• Phase diagram and collective excitation in excitonic insulator: from the orbital physics viewpoint
• Orbital character variation of the Fermi surface and doping dependent changes of the dimensionality in BaFe2-xCoxAs2 from angle-resolved photoemission spectroscopy
• Superconductivity-induced optical anomaly in an iron arsenide
• Impurities in multiband superconductors
• Dynamic electron correlations with charge order wavelength along all directions in the copper oxide plane
• Electronic polarons and bipolarons in Fe-based superconductors: a pairing mechanism
• Progressive slowing down of spin fluctuations in underdoped LaFeAsO${}_{1-x}$F${}_x$
• Intra-unit-cell nematic charge order in the titanium-oxypnictide family of superconductors
• Hubbard interactions in iron-based pnictides and chalcogenides: Slater parametrization, screening channels and frequency dependence
• Charge-Stripe Order in a Parent Compound of Iron-based Superconductors
• Strong Coupling of the Iron-Quadrupole and Anion-Dipole Polarizations in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Capacitance and compressibility of heterostructures with strong electronic correlations
• Coupling of the A_{1g} As-phonon to magnetism in iron pnictides
• New insight into the physics of iron pnictides from optical and penetration depth data
• Synthesis of ErFeAsO-based superconductors by hydrogen doping method
• Resonant Inelastic X-ray Scattering Study of Electron-Exciton Coupling in High-Tc Cuprates
• Strength of Correlations in a Silver Based Cuprate Analogue
• Constraints on the total coupling strength to bosons in iron based superconductors
• The role of the lattice structure in determining the magnon-mediated interactions between charge carriers doped into a magnetically ordered background
• Pairing mechanism in Fe pnictide superconductors
• Nematicity in LaFeAsO${}_{1-x}$F${}_x$
• Contrast of LiFeAs with isostructural, isoelectronic, and non-superconducting MgFeGe
• Modulation doping of the FeSe monolayer on SrTiO${}_3$
• Mixed temperature-dependent order parameters in the extended Hubbard model