Flux-lattice melting in LaO${}_{1-x}$F${}_x$FeAs: first-principles prediction

Abstract

We report the theoretical study of the flux-lattice melting in the novel iron-based superconductor $La{O}_{0.9}{F}_{0.1}FeAs$ and $La{O}_{0.925}{F}_{0.075}FeAs$. Using the Hypernetted-Chain closure and an efficient algorithm, we calculate the two-dimensional one-component plasma pair distribution functions, static structure factors and direct correlation functions at various temperatures. The Hansen-Verlet freezing criterion is shown to be valid for vortex-liquid freezing in type-II superconductors. Flux-lattice meting lines for $La{O}_{0.9}{F}_{0.1}FeAs$ and $La{O}_{0.925}{F}_{0.075}FeAs$ are predicted through the combination of the density functional theory and the mean-field substrate approach.

5 pages, 4 figures, to appear in Phys. Rev. B

References in corpus (11)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• 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
• Superconductivity in iron-based F-doped layered quaternary compound Nd[O1-xFx]FeAs
• Thorium-doping induced superconductivity up to 56 K in Gd1-xThxFeAsO
• Superconductivity at 25 K in hole doped $(L{a}_{1-x}S{r}_x)OFeAs$
• Superconducting properties of Fe-based layered superconductor LaO${}_{0.9}$F${}_{0.1-\delta }$FeAs
• Nernst effect of the new iron-based superconductor LaO${}_{1-x}$F${}_x$FeAs
• Phase diagram of randomly pinned vortex matter in layered superconductors: dependence on the details of the point pinning
• Phase diagram of vortex matter in layered superconductors with random point pinning

Cited by in corpus (3)

• Intrinsic magnetic properties of NdFeAsO${}_{0.9}$F${}_{0.1}$ superconductor from local and global measurements
• Planar pinning induced, lowering of vortex dimensionality and low field melting in a single crystal of Ba0.6K0.4Fe2As2
• Elastic theory for the vortex-lattice melting in iron-based high-Tc superconductors