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中文摘要：
将复式BN结构引入固/气型声子晶体，其基元包含两个截面半径不同的圆柱体，三角格子和石墨结构作为BN结构的特殊情况被考虑在其中。用平面波法研究了其带隙结构，发现改变两圆柱体的截面半径比及填充率，就可调节声子晶体的带隙结构和范围，从而实现有选择性的滤波效应。此外，三角晶格容易在高填充率下获得高频宽带隙，而普通BN结构及石墨结构在低填充率条件下可获得低频宽带隙。
英文摘要：
The complex BN structure was drawn into solid/air system phononic crystals, their basis is composed of two steel cylinders with different section radius. The plane wave expansion method was applied to calculate band gap structures of the phononic crystals. The triangular and graphite lattices were also investigated as special cases. Numerical results show that the band gap structures and areas can be adjusted by altering the radius ratio and filling fraction of the two cylinders. Thus, we can filter elastic wave selective. In addition, the large band gaps with high frequency are easily achieved for triangular lattice at high filling fraction, while for the general BN and graphite lattices, the wide band gaps appear at low frequency with low filling fraction are also easy to be obtained.
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Exchange-enhanced spin splitting in a two-dimensional electron gas in the presence of spin–orbit int
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