超晶格热容中的声子参与

2002 23rd International Conference on Microelectronics. Proceedings (Cat. No.02TH8595) Pub Date : 2002-08-07 DOI:10.1109/MIEL.2002.1003217

J. Šetrajčić, S. Jaćimovski, D. Mirjanić

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引用次数: 0

摘要

利用双时间相关格林函数的方法分析了超晶格的声子谱和热力学特性。确定了系统的内能和比热。将超晶格的比热与体结构和薄膜的比热进行了比较。结果表明，在极低温度下，超晶格比热和薄膜比热实际上是相等的，并且大大低于体样品的比热。

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Phonon participation in superlattice heat capacity

Phonon spectra as well as thermodynamic characteristics of superlattices are analyzed using the method of two-time dependent Green's functions. The internal energy of the system and specific heat are determined. The temperature related behaviour of the specific heat of a superlattice is compared to specific heats of bulk structures and thin films. It has been shown that, at extremely low temperatures, superlattice and film specific heats are practically equal and considerably lower than the specific heat of bulk sample.

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2002 23rd International Conference on Microelectronics. Proceedings (Cat. No.02TH8595)

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