新合成的CoSeAs白铁矿中的磁有序和不稳定性。

Magnetic order and instability in newly synthesized CoSeAs marcasite.

作者信息

Chen Yiyao, Yumnam G, Dahal A, Rodriguez-Rivera J A, Xu Guangyong, Heitmann T W, Singh D K

机构信息

Department of Physics and Astronomy, University of Missouri, Columbia, Missouri 65211, USA.

National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.

出版信息

Phys Rev Res. 2020;2(2). doi: 10.1103/physrevresearch.2.023168.

DOI:10.1103/physrevresearch.2.023168

PMID:40144348

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11938387/

Abstract

Marcasite class of compounds provide a facile platform to explore novel phenomena of fundamental and technological importance, such as unconventional superconductivity or high-performance electrocatalyst. We report the synthesis and experimental investigation of a marcasite CoSeAs in this paper. Experimental investigation of this material using neutron scattering measurements reveals weak magnetic correlation of cobalt ions below K. The modest isotropic exchange interaction between cobalt moments, inferred from random phase approximation analysis, hints of a magnetically unstable environment. It is a desirable characteristic to induce unconventional superconductivity via chemical pressure application.

摘要

白铁矿类化合物为探索具有基础和技术重要性的新现象提供了一个便捷的平台，例如非常规超导或高性能电催化剂。在本文中，我们报道了白铁矿CoSeAs的合成及实验研究。使用中子散射测量对该材料进行的实验研究表明，钴离子在低于K时存在弱磁相关性。从随机相位近似分析推断出的钴磁矩之间适度的各向同性交换相互作用，暗示了一种磁不稳定环境。通过施加化学压力诱导非常规超导是一个理想的特性。