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Metallic Solids

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...

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Iron-based layered superconductor: LaOFeP.

Yoichi Kamihara¹, Hidenori Hiramatsu, Masahiro Hirano

¹ERATO-SORST, JST, Frontier Collaborative Research Center, Tokyo Institute of Technology, Mail Box S2-13, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan.

Journal of the American Chemical Society

|August 3, 2006

Summary

We discovered superconductivity in LaOFeP, an iron-based layered oxy-pnictide. This material exhibits a superconducting transition near 4 Kelvin, confirmed by magnetic and resistivity measurements.

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Area of Science:

Condensed Matter Physics
Materials Science
Solid State Chemistry

Background:

Superconductivity is a quantum mechanical phenomenon observed in certain materials.
Iron-based superconductors are a significant class of materials with unique electronic properties.
Layered oxy-pnictides offer a promising platform for exploring novel superconducting mechanisms.

Purpose of the Study:

To report the discovery of superconductivity in a novel iron-based layered oxy-pnictide, LaOFeP.
To characterize the superconducting properties of LaOFeP.
To investigate the structural and electronic basis for superconductivity in this material.

Main Methods:

Synthesis and characterization of the LaOFeP compound.
Magnetic susceptibility measurements to detect the Meissner effect.
Electrical resistivity measurements to determine the superconducting transition temperature.

Main Results:

Superconductivity was observed in LaOFeP.
The superconducting transition temperature (Tc) was determined to be approximately 4 K.
Structural analysis revealed an alternating stack of lanthanum oxide and iron pnictide layers.

Conclusions:

LaOFeP is a newly identified iron-based layered oxy-pnictide superconductor.
The discovery expands the family of known superconducting materials.
Further research can explore the mechanism of superconductivity in LaOFeP and related compounds.