静水压力对Al14Mn2P16磁光性质影响的密度泛函理论研究

doi:10.19596/j.cnki.1001-246x.8023

计算物理 ›› 2020, Vol. 37 ›› Issue (2): 231-239.DOI: 10.19596/j.cnki.1001-246x.8023

静水压力对Al₁₄Mn₂P₁₆磁光性质影响的密度泛函理论研究

陈余, 邢永明

内蒙古工业大学理学院, 内蒙古呼和浩特 010051

收稿日期:2018-12-17 修回日期:2019-02-21 出版日期:2020-03-25 发布日期:2020-03-25
通讯作者: 邢永明,E-mail:xym@imut.edu.cn
作者简介:陈余(1985-),男,博士研究生,实验师,主要从事半导体磁光性质的研究,E-mail:chentws@aliyun.com
基金资助:
内蒙古自治区研究生科研创新项目（B20171012801Z）、内蒙古工业大学科学研究项目（X201712）资助

Effect of Hydrostatic Pressure on Magneto-optical Properties of Al₁₄Mn₂P₁₆: A Density Functional Theory Study

CHEN Yu, XING Yongming

School of Science, Inner Mongolia University of Technology, Hohhot, Inner Mongolia 010051, China

Received:2018-12-17 Revised:2019-02-21 Online:2020-03-25 Published:2020-03-25

摘要/Abstract

摘要： 采用第一性原理，研究不同静水压力（0~20 GPa）下Al₁₄Mn₂P₁₆的弹性与磁光性质.计算得到基态是铁磁态.弹性稳定性判据表明该体系是稳定的.研究发现磁矩随静水压力的增加而减小.静水压力低于5 GPa时，居里温度达到184 K，随着静水压力的增加略有下降；有趣的是，当静水压力高于5 GPa时，随着静水压力的增加，居里温度急剧下降，在18 GPa时消失.同时还发现随静水压力的增加可见光范围的吸收峰有明显的蓝移，当静水压力达到20 GPa时，可见光范围的吸收峰消失.

关键词: 稀磁半导体, 居里温度, 静水压力, 密度泛函理论

Abstract: With first-principle calculations, we investigate elastic and magneto-optical properties of Al₁₄Mn₂P₁₆ under hydrostatic pressures (0~20 GPa). Our calculations show that the ground state is a ferromagnetic state. The system was proved stable according to the elastic stability criterion. The magnetic moment decreases with increasing hydrostatic pressure. Below 5 GPa, the system hosts Curie temperature (T_C) of 184 K combine with a slightly decrease with increasing hydrostatic pressure. Furthermore, intriguingly, as external pressure furthers improves, T_C drops sharply, even vanishes at 18 GPa. It was found that the absorption peak in visible optical range has obvious blue shift. As hydrostatic pressure reaches 20 GPa, absorption peak in visible optical range disappears.

Key words: diluted magnetic semiconductors, Curie temperature, hydrostatic pressure, density functional theory

中图分类号:

O472.3

陈余, 邢永明. 静水压力对Al₁₄Mn₂P₁₆磁光性质影响的密度泛函理论研究[J]. 计算物理, 2020, 37(2): 231-239.

CHEN Yu, XING Yongming. Effect of Hydrostatic Pressure on Magneto-optical Properties of Al₁₄Mn₂P₁₆: A Density Functional Theory Study[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2020, 37(2): 231-239.

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静水压力对Al₁₄Mn₂P₁₆磁光性质影响的密度泛函理论研究

Effect of Hydrostatic Pressure on Magneto-optical Properties of Al₁₄Mn₂P₁₆: A Density Functional Theory Study

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