Effect of disorder on superconductivity of NbN thin films studied using x-ray absorption spectroscopy

Electronic structure of CeCo2 thin films studied by X-ray absorption spectroscopy

We present an X-ray absorption near-edge structure (XANES) study at Ce L3-, and Co K-edges of CeCo2 thin films with the thickness varying from 30 to 140 nm. Ce L3-edge spectra exhibit the mixed valence nature and the tetravalent contribution increases with the thickness of CeCo2. The variation in the spectral intensity observed at Co K-edge threshold indicates that there is a change in 3d occup...

Metal induced crystallization of amorphous silicon thin films studied by x-ray absorption fine structure spectroscopy

The role of thin metallic layer (Chromium or Nickel) in the crystallization of a-Si film has been studied using X-ray absorption fine structure spectroscopy (XAFS). The films were grown at different substrate temperatures in two different geometrical structures : (a) a 200 nm metal layer (Cr or Ni) was deposited on fused silica (FS) followed by 400 nm of a-Si and (b) the 400 nm a-Si layer was d...

Probing surface states of Cu/Ni thin films using x-ray absorption spectroscopy

X-ray absorption spectroscopy elucidates the impact of structural disorder on electron mobility in amorphous zinc-tin-oxide thin films

on electron mobility in amorphous zinc-tin-oxide thin films Sin Cheng Siah, Sang Woon Lee, Yun Seog Lee, Jaeyeong Heo, Tomohiro Shibata, Carlo U. Segre, Roy G. Gordon, and Tonio Buonassisi Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA Department of Materials Science...

Energy-gap dynamics of superconducting NbN thin films studied by time-resolved terahertz spectroscopy.

Using time-domain terahertz spectroscopy we performed direct studies of the photoinduced suppression and recovery of the superconducting gap in a conventional BCS superconductor NbN. Both processes are found to be strongly temperature and excitation density dependent. The analysis of the data with the established phenomenological Rothwarf-Taylor model enabled us to determine the bare quasiparti...