Physics – Condensed Matter – Superconductivity
Scientific paper
2009-05-04
Phys. Rev. B 81, 060507(R) (2010)
Physics
Condensed Matter
Superconductivity
Scientific paper
We use angle resolved photoemission spectroscopy (ARPES) to study the band structure of BaFe2As2 and CaFe2As2, two of the parent compounds of the iron arsenic high temperature superconductors. We find clear evidence for band back folding and hybridization demonstrating that conduction electrons are strongly affected by the emergence of magnetic order. Our high quality data revealed that although the Fermi surface is strongly three-dimensional, it does indeed have long parallel segments along the kz direction that can lead to the emergence of magnetic order. More interestingly, we find very unusual incommensurate nesting of the Fermi surface in the a-b plane that is present only at low temperatures. We speculate that this is a signature of a failed Charge Density Wave (CDW) state that was predicted by renormalization group studies.
Bostwick Aaron
Bud'ko Sergey L.
Canfield Paul. C.
Fernandes Rafael M.
Kaminski Adam
No associations
LandOfFree
Unusual Fermi surface nesting in parent compounds of iron arsenic high temperature superconductors revealed by Angle Resolved Photoemission Spectroscopy 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 Unusual Fermi surface nesting in parent compounds of iron arsenic high temperature superconductors revealed by Angle Resolved Photoemission Spectroscopy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Unusual Fermi surface nesting in parent compounds of iron arsenic high temperature superconductors revealed by Angle Resolved Photoemission Spectroscopy will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-198820