Competing orders and spin-density-wave instability in La(O <sub>1−x</sub> F <sub>x</sub> )FeAs
Competing orders and spin-density-wave instability in La(O <sub>1−x</sub> F <sub>x</sub> )FeAs
The interplay between different ordered phases, such as superconducting, charge or spin ordered phases, is of central interest in condensed matter physics. The very recent discovery of superconductivity with a remarkable T$_c$= 26 K in Fe-based oxypnictide La(O$_{1-x}$F$_x$)FeAs is a surprise to the scientific community\cite{Kamihara08}. The pure LaOFeAs itself is …