Physics – Condensed Matter – Superconductivity
Scientific paper
2011-02-10
Physics
Condensed Matter
Superconductivity
4 pages, 5 figures
Scientific paper
We report on the local electronic structure of oxygen incorporated FeTe and FeSe films and how this relates to superconductivity observed in these films. In the case of FeTe, intially grown films are measured to be non-superconducting, but become superconducting following oxygen incorporation. In FeSe the opposite happens, initially grown films are measured to be superconducting, but experience a quenching of superconductivity following oxygen incorporation. Total Fluorescence Yield (TFY) X-ray absorption experiments show that oxygen incorporation changes the initial Fe valence state in both the initially grown FeTe and FeSe films to mainly Fe3+ in the oxygen incorporated films. In contrast we observe that while Te moves to a mixed Te0/Te4+ valence state, the Se always remains Se0. This work highlights how different responses of the electronic structure by the respective chalcogenides to oxidation could be related to the mechanisms which are inducing superconductivity in FeTe and quenching superconductivity in FeSe.
Budnick Joseph I.
Nie Yi-You
Sinkovic Boris
Telesca Donald
Wells Barrett O.
No associations
LandOfFree
Impact of Valence States on Superconductivity of Oxygen Incorporated Iron Telluride and Iron Selenide Films 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 Impact of Valence States on Superconductivity of Oxygen Incorporated Iron Telluride and Iron Selenide Films, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Impact of Valence States on Superconductivity of Oxygen Incorporated Iron Telluride and Iron Selenide Films will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-694633