Electronic correlations in epitaxial CrN thin film.

Chromium nitride (CrN) spurred enormous interest due to its coupled magnetostructural and unique metal-insulator transition. The underneath electronic structure of CrN remains elusive. Herein, the electronic structure of epitaxial CrN thin film has been explored by employing resonant photoemission spectroscopy (RPES) and X-ray absorption near edge spectroscopy study in combination with the first-principles calculations.

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

The superconducting transition temperature () of rock-salt type niobium nitride (- NbN) typically varies between 9 to 17 K and the theoretically predicted value of 18 K has not been achieved hitherto. The lowin- NbN has been assigned to some structural disorder which is always present irrespective of the microstructure (polycrystalline or epitaxial), methods or conditions adopted during the growth of NbN thin films. In this work, we investigate the atomic origin of such suppression of thein- NbN thin films by employing combined methods of experiments andsimulations.