Physics – Condensed Matter – Superconductivity
Scientific paper
2008-10-14
published in Phys. Rev. B 78, 180503(R) (2008)
Physics
Condensed Matter
Superconductivity
4 pages, 4 figures, to be published in Phys. Rev. B as a Rapid Communication
Scientific paper
10.1103/PhysRevB.78.180503
We have successfully synthesized the fluo-arsenide SrFeAsF, a new parent phase with the ZrCuAsSi structure. The temperature dependence of resistivity and dc magnetization both reveal an anomaly at about T_{an} = 173 K, which may correspond to the structural and/or Spin-Density-Wave (SDW) transition. Strong Hall effect and magnetoresistance were observed below T_{an}. Interestingly, the Hall coefficient R_H is positive below T_{an}, which is opposite to the cases in the two parent phases of FeAs-based systems known so far, i.e., LnFeAsO (Ln = rare earth elements) and (Ba, Sr)Fe_2As_2 where the Hall coefficient R_H is negative. This strongly suggests that the gapping to the Fermi surfaces induced by the SDW order is more complex than we believed before that it removes the density of states on some Fermi pockets and leaves one of the electron pockets less-gapped or un-gapped. Our data clearly show that it is possible for the parent phase to have electron-like or hole-like charge carriers.
Cheng Peng
Han Fei
Mu Gang
Wen Hai-hu
Zhu Xiyu
No associations
LandOfFree
SrFeAsF as a parent compound for iron pnictide superconductors 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 SrFeAsF as a parent compound for iron pnictide superconductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and SrFeAsF as a parent compound for iron pnictide superconductors will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-591650