Magnetism and optical spectral of half-metallic BaX (X = N, P, As)

Magnetism and optical spectral of half-metallic BaX (X = N, P, As)
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半金属BaX(X=N、P、As)的磁性和光谱

DOI:
10.1016/j.commatsci.2008.04.007
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发表时间:
2008-12
影响因子:
3.3
通讯作者:
--
中科院分区:
材料科学3区
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--
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采用密度泛函理论的广义梯度近似(GGA)方法研究了NiAs带BaX(X=N,P,As)化合物的电子结构、磁性和光学性质.不含过渡金属和稀土元素的化合物的电子结构表明它们是铁磁半金属,它们的磁矩主要来源于钡原子阴离子原子p轨道和d轨道的自旋极化。我们还计算了这些化合物的光学性质(介电,吸收和能量损失函数),并表明,这些化合物的半金属特性引起的光谱中的一些功能。
The generalized gradient approximation (GGA) to the density-functional theory in the pseudopotential planewave-formalism has been used to investigate the electronic structures, magnetic and optical properties of the NiAs-tape BaX (X=N, P and As) compounds. Electronic structures of these compounds that do not contain transition metal or rare earth elements indicate that they are ferromagnetic half-metal, and their magnetic moments mainly originate from the spin polarization of the anion atomic p-orbits and d-orbits of barium atoms. We also calculate the optical properties (dielectric, absorption, and energy loss function) of these compounds, and show that the half-metal characteristic of these compounds gives rise to some features in optical spectrum.
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