Kinetic frustration and the nature of the magnetic and paramagnetic states in iron pnictides and iron chalcogenides

Details Kinetic frustration and the nature of the magnetic and paramagnetic states in iron pnictides and iron chalcogenides Kinetic frustration and the nature of the magnetic and paramagnetic states in iron pnictides and iron chalcogenides

2011-04-18

arxiv.org/abs/1104.3454v1

Nature Materials 10, 932-935 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 3 figures with a 5-page supplementary material

Scientific paper

10.1038/nmat3120

The iron pnictide and chalcogenide compounds are a subject of intensive investigations due to their high temperature superconductivity.\cite{a-LaFeAsO} They all share the same structure, but there is significant variation in their physical properties, such as magnetic ordered moments, effective masses, superconducting gaps and T$_c$. Many theoretical techniques have been applied to individual compounds but no consistent description of the trends is available \cite{np-review}. We carry out a comparative theoretical study of a large number of iron-based compounds in both their magnetic and paramagnetic states. We show that the nature of both states is well described by our method and the trends in all the calculated physical properties such as the ordered moments, effective masses and Fermi surfaces are in good agreement with experiments across the compounds. The variation of these properties can be traced to variations in the key structural parameters, rather than changes in the screening of the Coulomb interactions. Our results provide a natural explanation of the strongly Fermi surface dependent superconducting gaps observed in experiments\cite{Ding}. We propose a specific optimization of the crystal structure to look for higher T$_c$ superconductors.

Affiliated with

Also associated with

No associations

Rating

Kinetic frustration and the nature of the magnetic and paramagnetic states in iron pnictides and iron chalcogenides does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Kinetic frustration and the nature of the magnetic and paramagnetic states in iron pnictides and iron chalcogenides, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Kinetic frustration and the nature of the magnetic and paramagnetic states in iron pnictides and iron chalcogenides will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-71981