Study of the vibrational modes of GaSb/AlSb (001) superlattices
Study of the vibrational modes of GaSb/AlSb (001) superlattices
复制标题
GaSb/AlSb(001)超晶格振动模式的研究
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
D. Berdekas
中科院分区：
文献类型：
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作者：
D. Berdekas
本文研究了沿(001)方向生长的小周期(GaSb)n/(AlSb)n超晶格，n=1，2，3的振动模。任何超晶格(SL)都可以用一个三维基元来描述，该基元比锌混合体成分的基元大几倍。在短程和长程作用力下，用十参数(10)价重叠壳模型计算了双星GaSb和AlSb的相互作用。在原子位移已知的情况下，我们基于键极化率模型计算了不同共振条件下的拉曼光谱。我们的结果与已有的实验数据符合得很好。
In the present work, we study the modes of vibration of small period (GaSb)n/(AlSb)n supelattices, n=1,2,3, grown along (001) direction. Any supelattice (SL) is described by a three dimensional elementary cell several times bigger of the elementary cell of the zinc blend bulk constituents. The modes of vibration are calculated using a ten parameter (10) Valence Overlap Shell Model, with the interactions of the binaries GaSb and AlSb calculated with different parameter sets, for both short and long range forces. With the atomic displacements known, we calculated the Raman spectra, away of resonance conditions, based on the Bond Polarizability Model. Our results are in good agreement with the existing experimental data.