arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2012.13715cond-mat.mtrl-sci
收藏

密度泛函理论研究$SmFeO_3$的结构、弹性和电子性质

Structural, Elastic and Electronic Properties of $SmFeO_3$ using Density Functional Theory

Shahran Ahmed, Sadiq Shahriyar Nishat, Alamgir Kabir, A. K. M. Sarwar Hossain Faysal, Tarique Hasan, Shovon Chakraborty, Imtiaz Ahmed

摘要:

我们在密度泛函理论的框架下对正交晶系钐正铁氧体$SmFeO_3$的结构、弹性和电子性质进行了第一性原理模拟。一些不同的密度泛函,如局域密度近似,广义梯度近似,Hubbard相互作用修正的泛函,修正的Becke $-$ Johnson近似和Heyd $-$ Scuseria $-$ Ernzerhof混合泛函被用来模拟电子交换关联.我们估计了$SmFeO_3$不同磁位形的基态能量。$SmFeO_3$的晶体结构的特征在于在晶格参数,原子位置,相关的离子半径,键长和键角。根据其弹性性质模拟了$SmFeO_3$正交结构的稳定性。对于电子结构的模拟,我们提供了估计的基础上密度泛函与不同程度的计算复杂性的雅各布阶梯。

英文摘要:

We perform first principles simulations for the structural, elastic and electronic properties of orthorhombic samarium orthoferrite $SmFeO_3$ within the framework of density functional theory. A number of different density functionals, such as local density approximation, generalized gradient approximation, Hubbard interaction modified functional, modified Becke$-$Johnson approximation and Heyd$-$Scuseria$-$Ernzerhof hybrid functional have been used to model the exact electron exchange-correlation. We estimate the energy of the ground state for different magnetic configurations of $SmFeO_3$. The crystal structure of $SmFeO_3$ is characterized in terms of the lattice parameters, atomic positions, relevant ionic radii, bond lengths and bond angles. The stability of the $SmFeO_3$ orthorhombic structure is simulated in terms of its elastic properties. For the electronic structure simulations, we provide estimates based on density functionals with varying degrees of computational complexities in the Jacob's ladder.

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。

↑