English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

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 3 d e   g  states remain in persistently out-of-plane 3 d   3z   2   -r   2  orbitals. In contrast, in the warming process below the transition temperature, they change from 3 d   3z   2   -r   2  to in-plane 3 d   x   2   -y   2  orbitals. The nearest-neighbor (NN) Fe-O bond lengths also exhibit anisotropic behavior in the   ab  -plane and along the   c  -axis below T m . The anisotropic NN Fe-O bond lengths and Debye-Waller factors stabilize the in-plane Fe 3 d   x   2   -y   2  and out-of-plane 3 d   3z   2   -r   2  orbitals during warming and cooling, respectively. Additionally, a VB-PES study further confirms that a relative band gap opens at low temperature in both the   ab  -plane and along the   c  -axis, providing the clear evidence of the charge-density-wave nature of SrFeO 3-δ  (δ~0.19) single crystal.

scientific reports

Anisotropy in the thermal hysteresis of resistivity and charge density wave nature of single crystal SrFeO3-δ: X-ray absorption and photoemission studies