Electronic structure and properties of FeS2 with the space groups of Pa3 and P1

Electronic structure and properties of FeS2 with the space groups of Pa3 and P1
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Pa3和P1空间群FeS2的电子结构和性质

DOI:
10.1007/s12613-013-0782-8
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发表时间:
2013-07
影响因子:
4.8
通讯作者:
Chen, Ye
Chen, Ye
中科院分区:
材料科学2区
文献类型:
--
作者:
Wu, Bo-zeng;Chen, Jian-hua;Li, Yu-qiong;Chen, Ye

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利用密度泛函理论研究了Pa3和P1空间群的FeS2的电子结构和性质。广义梯度近似交换相关函数与平面波超软赝势表示结合使用。计算结果表明Pa3和P1晶体的电子结构和性质存在差异。 P1的带隙和能量损失比Pa3晶体小,而P1的介电常数、电导率、折射率、消光系数和光吸收强度比Pa3大。这些行为归因于 Pa3 和 P1 晶体每个单元的对称性、原子排列和马利肯键布居的差异。
The electronic structure and properties of FeS2 with the space groups of Pa3 and P1 were studied by the density functional theory. The generalized-gradient approximation exchange-correlation functional was used in conjunction with a plane wave-ultrasoft pseudopotential representation. Calculation results show that differences are observed in electronic structures and properties between Pa3 and P1 crystals. The band gap and energy loss of P1 are smaller than those of Pa3 crystal, while the dielectric constant, conductivity, refractive index, extinction coefficient, and intensity of optical absorption of P1 are larger than those of Pa3. These behaviors are attributed to the differences in symmetry, atomic arrangement, and Mulliken bond population of each unit for Pa3 and P1 crystals.
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