Abstract
We report the synthesis of a quasi-one-dimensional (1D) iron selenide . It was synthesized at high temperature and high pressure of 5.5 GPa and systematically studied via structural, magnetic, and transport measurements at both ambient and high pressure. crystallizes in a monoclinic structure and consists of face-sharing octahedral chains running in -direction. It shows a sizable unquenched orbital moment and undergoes a ferromagnetic-like phase transition at 14 K. At ambient pressure, exhibits an insulating behavior with a band gap of ∼460 meV. Under high pressure, a complete metallization occurs at ∼29 GPa, which is accompanied by a spin state crossover from high-spin to low-spin state.
- Received 10 February 2021
- Accepted 21 April 2021
DOI:https://doi.org/10.1103/PhysRevMaterials.5.054606
©2021 American Physical Society