Physics – Condensed Matter – Superconductivity
Scientific paper
2011-06-28
J. Am. Chem. Soc.133, 7892(2011)
Physics
Condensed Matter
Superconductivity
18 pages, 3 Figures
Scientific paper
The effect of pressure on the crystalline structure and superconducting transition temperature (Tc) of the 111-type Na1-xFeAs system using in situ high pressure synchrotron x-ray powder diffraction and diamond anvil cell techniques is studied. A pressure-induced tetragonal to tetragonal isostructural phase transition was found. The systematic evolution of the FeAs4 tetrahedron as a function of pressure based on Rietveld refinements on the powder x-ray diffraction patterns was obtained. The non-monotonic Tc(P) behavior of Na1-xFeAs is found to correlate with the anomalies of the distance between the anion (As) and the iron layer as well as the bond angle between As-Fe-As for the two tetragonal phases. This behavior provides the key structural information in understanding the origin of the pressure dependence of Tc for 111-type iron pnictide superconductors. A pressure-induced structural phase transition is also observed at 20 GPa.
Chen Zhiqiang
Deng Zheng
Jin Changqing
Lin Zhijun
Liu Haozhe
No associations
LandOfFree
Pressure-induced isostructural phase transition and correlation of FeAs coordination with the superconducting properties of 111-type Na1-xFeAs 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 Pressure-induced isostructural phase transition and correlation of FeAs coordination with the superconducting properties of 111-type Na1-xFeAs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure-induced isostructural phase transition and correlation of FeAs coordination with the superconducting properties of 111-type Na1-xFeAs will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-41132