Anisotropy in the thermal hysteresis of resistivity and charge density wave nature of single crystal SrFeO_3-δ: X-ray absorption and photoemission studies.

ABSTRACT: The local electronic and atomic structures of the high-quality single crystal of SrFeO_3-δ (δ~0.19) were studied using temperature-dependent x-ray absorption and valence-band photoemission spectroscopy (VB-PES) to investigate the origin of anisotropic resistivity in the ab-plane and along the c-axis close to the region of thermal hysteresis (near temperature for susceptibility maximum, T_m~78 K). All experiments herein were conducted during warming and cooling processes. The Fe L _3,2-edge X-ray linear dichroism results show that during cooling from room temperature to below the transition temperature, the unoccupied Fe 3d e _g states remain in persistently out-of-plane 3d _3z²_-r² orbitals. In contrast, in t

SUBMITTER: Hsieh SH 

PROVIDER: S-EPMC5428035 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature