2014/12/03 by Qiucheng Ji, Yonghui Ma, Kangkang Hu +9 · 12 citations
Materials Science · Physics and Astronomy · #Anomaly (physics) #Charge density wave #Charge ordering #Cuprate #Electronic and Structural Properties of Oxides #Iron-based superconductors research #Magnetization #Phase transition #Superconductivity #Topological Materials and Phenomena #Transition temperature #cond-mat.mtrl-sci #cond-mat.supr-con
paper · pdf · doi:10.1021/ic502192h
published in Inorganic Chemistry 53(24), 13089-13092 (American Chemical Society) · 17 pages, 6 figures
openalex publication_date 2014/12/03 · arxiv created 2014/12/15 · arxiv updated 2014/12/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The interplay between unconventional superconductivity and the ordering of charge/spin density wave is one of the most vital issues in both condensed matter physics and material science. The Ti-based compound BaTi2As2O, which can be seen as the parent phase of superconducting BaTi2Sb2O, has a layered structure with a space group P4/mmm, similar to that of cuprate and iron-based superconductors. This material exhibits a charge density wave (CDW) ordering transition revealed by an anomaly at around 200 K in transport measurements. Here, we report the synthesis and systematical study of the physical properties in Cr-doped BaTi(2-x)Cr(x)As2O (x = 0-0.154) and demonstrate that the transition temperature of the CDW ordering is suppressed gradually by the doped Cr element. The magnetization measurements confirm the evolution of the CDW ordering transition. These observed behaviors are similar to that observed in iron-based superconductors, but no superconductivity emerges down to 2 K. In addition, the first-principles calculations are also carried out for well-understanding the nature of experimental observations.