任意层厚双组分超晶格中声子的局域化
Localization of Phonons in Two Component Superlattice with Random Thicknesses of the Layers
摘要：
考虑了2N层双组分超晶格薄膜，得到了声子-s的量纲量子化谱，研究了任意层厚超晶格中声子-s的局域化问题。精确计算了声子输运的朗道电阻。数值分析表明，对于短程无序，在频率ω=0时，存在离域态，关联长度指数ν = 2。
英文摘要：
Two component superlattice film of 2N layers is considered and dimensionally quantised spectrum of phonon-s is found. The problem of localization of phonon-s in the superlattice with random thicknesses of the layers is investigated. The Landauer resistance of the transport of phonon-s is calculated exactly. For short range disorder the numerical analyses shows, that at frequency ω=0, there is delocalized state and the correlation length index νis equal to 2.
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