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[求助] 考虑自旋轨道耦合(soc)之后的能带分析

如下图,黑线是加上soc的,红线是没加soc的,文中是这么描述这个图的
The eff ect of the spin-orbit coupling causes a very large splitting of energy bands, as can be seen in Figs. 4.4(a) and 4.4(b), by comparing two calculations performed with and without the SOC. Namely, there is a large splitting of the 6p levels due to the SOC, in particular, at the Gamma point the splitting is as large as 1.5 eV.

考虑自旋轨道耦合(soc)之后的能带分析

具体这个splitting是怎么回事啊?文中所说Gamma点1.5 eV的splitting又是什么情况?
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