Heteroepitaxial growth and optoelectronic properties of layered iron oxyarsenide, LaFeAsO

Abstract

Epitaxial thin films of LaFeAsO were fabricated on MgO (001) and mixed-perovskite (La, Sr)(Al, Ta)O3 (001) single-crystal substrates by pulsed laser deposition using a Nd:YAG second harmonic source and a 10 at.% F-doped LaFeAsO disk target. Temperature dependences of the electrical resistivities showed no superconducting transition in the temperature range of 2-300 K, and were similar to those of undoped polycrystalline bulk samples. The transmittance spectrum exhibited a clear peak at ~0.2 eV, which is explained by ab-initio calculations.

Submission: 31st July 2008, Accepted for publication in Appl. Phys. Lett

References in corpus (11)

• 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 up to 37 K in (A1-xSrx)Fe2As2 with A=K and Cs
• Crystallographic Phase Transition and High-Tc Superconductivity in LaFeAsO:F
• Critical Fields and Anisotropy of NdO0.82F0.18FeAs Single Crystals
• A possible ground state and its electronic structure of a mother material (LaOFeAs) of new superconductors
• Hall effect and magnetoresistance in single crystals of NdFeAsO${}_{1-x}$F${}_x$
• Angular dependence of resistivity in the superconducting state of NdFeAsO${}_{0.82}$F${}_{0.18}$ single crystals
• Phase Diagram and Quantum Critical Point in Newly Discovered Superconductors: SmO_{1-x}F_xFeAs

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• High Critical Current Density 4 MA/cm2 in Co-Doped BaFe2As2 Epitaxial Films Grown on (La, Sr)(Al, Ta)O3 Substrates without Buffer Layers
• Preparation and superconductivity of iron selenide thin films
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• Atomically-flat, chemically-stable, superconducting epitaxial thin film of iron-based superconductor, cobalt-doped BaFe${}_2$As${}_2$
• Epitaxial Growth of NdFeAsO Thin Films by Molecular Beam Epitaxy
• DC superconducting quantum interference devices fabricated using bicrystal grain boundary junctions in Co-doped BaFe2As2 epitaxial films
• Thin film growth by pulsed laser deposition and properties of 122-type iron-based superconductor AE(Fe1--xCox)2As2 (AE = alkaline earth)
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• Lessons from Oxypnictide Thin Films
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• Inter- to Intra-Layer Resistivity Anisotropy of NdFeAs(O,H) with Various Hydrogen Concentrations
• Nonreciprocal charge transport in an iron-based superconductor with broken inversion symmetry engineered by a hydrogen-concentration gradient