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arXiv 2106.03026cond-mat.mtrl-sci
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新系列FeCr-based四元Heusler合金半金属性和无自旋带隙半导体行为的从头算研究

Prediction of half-metallicity and spin-gapless semiconducting behavior in the new series of FeCr-based quaternary Heusler alloys: an ab initio study

Ramesh Dhakal, Sashi Nepal, Iosif Galanakis, Rajendra Prasad Adhikari, Gopi Chandra Kaphle

摘要:

本文详细研究了FeCr基四元Heusler合金。在密度泛函理论的框架下,利用超软赝势,利用量子Espresso程序包,研究了化合物的电子和磁性。通过对不同力学参数和声子色散曲线的综合研究,建立了化合物的热力学、力学和动力学稳定性。对弹性参数如体积、杨氏模量、剪切模量等进行细致的研究,以了解不同的力学性能。研究了含钇的FeCr基化合物,以纠正文献中观察到的相互矛盾的电子和磁性。在所研究的化合物中实现了半金属性和无自旋能隙半导体(SGS)行为等有趣的性质。

英文摘要:

This paper presents a detailed investigation of FeCr-based quaternary Heusler alloys. By using ultrasoft pseudopotential, electronic and magnetic properties of the compounds are studied within the framework of Density Functional Theory (DFT) by using the Quantum Espresso package. The thermodynamic, mechanical, and dynamical stability of the compounds is established through the comprehensive study of different mechanical parameters and phonon dispersion curves. The meticulous study of elastic parameters such as bulk, Young's, shear moduli, etc. is done to understand different mechanical properties. The FeCr-based compounds containing also Yttrium are studied to redress the contradictory electronic and magnetic properties observed in the literature. The interesting properties like half-metallicity and spin-gapless semiconducting (SGS) behavior are realized in the compounds under study.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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