Pressure‐Induced Structural and Semiconductor‐Metal‐Superconductor Transitions in a High‐Entropy van der Waals Compound (MnFeCuCdIn)PSe3

Author:

Zhang Xiaoliang1,Li Weiwei1,Feng Jiajia1,Song Meng1,Wang Gui1,Liu Junxiu1,Wang Zifan1,Jiang Sheng2,Sheng Hongwei1,Chen Bin1,Zhang Hengzhong1

Affiliation:

1. Center for High Pressure Science and Technology Advanced Research Shanghai 201203 China

2. Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201204 China

Abstract

AbstractThe properties of the emerging phosphochalcogenide compounds can be tuned by temperature, pressure, and the chemical composition characterized by the compound entropy. However, it is unknown how the entropy of such a compound affects its structural stability and material properties when a state variable changes. In this work, a new layered high‐entropy phosphoselenide compound (MnFeCuCdIn)PSe3 (denoted MPSe3) is prepared and its structural evolution and property changes are studied at pressures up to ≈60 GPa. It is found that the compound undergoes two isostructural changes at ≈10 and 20 GPa, a structural change forming a high‐coordination phase in ≈32–35 GPa, a semiconductor‐to‐metal transition in ≈28–30 GPa at room temperature, and a metal‐to‐superconductor transition in ≈2.5–4.9 K at a pressure from ≈43 to 58 GPa. Combining data from prior studies, it is further found that for the MPSe3‐type medium/high‐entropy compounds, there exists a linear relationship between the structural transition pressure and the cation mixing entropy, and an inverse nearly linear relationship between the superconducting critical temperature and the cation mixing entropy, with the latter due primarily to the decrease in the Debye temperature. These findings will have great importance for developing new complex materials using the evolving entropy engineering.

Funder

National Natural Science Foundation of China

Publisher

Wiley

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3