Author/Authors :
B.H. Mok، نويسنده , , C.L. Chen، نويسنده , , Tom H.H. Hsieh، نويسنده , , S.M. Rao، نويسنده , , T.W. Huang، نويسنده , , C.L. Dong، نويسنده , , M.C. Ling، نويسنده , , W.C. Wang، نويسنده , , M.K. Wu ، نويسنده , , T.B. Wu، نويسنده ,
Abstract :
Crystals of the new superconductor FeSe were investigated by X-ray absorption near edge structures spectroscopy (XANES) in the temperature range 300–77 K. Crystals with Se content varying from x=1–0.8 were used. The Fe K-edge spectra show a structure distortion and increase in hole content as x decreases. The Fe K-edge spectra also show changes when the crystals are cooled to 100 K which may be related to the orthorhombic distortion reported in these crystals. The data is examined in conjunction with XRD measurements on the crystals to seek a correlation.
Keywords :
C. X-ray diffraction , D. Electronic structure , D. Superconductivity , C. XAFS , B. Crystal Growth
