Phonon contribution to heat capacitance of nanolayered crystalline structures

被引：8

作者：

Setrajcic, Jovan P. ^{[1
]}

Jacimovski, Stevo K. ^{[2
]}

Sajfert, Vjekoslav D. ^{[3
]}

机构：

[1] Univ Novi Sad, Fac Sci, Dept Phys, Novi Sad 21000, Vojvodina, Serbia

[2] Acad Criminalist & Police Studies Belgrade, Zemun 11080, Serbia

[3] Univ Novi Sad, Tech Fac M Pupin, Zrenjanin 23000, Vojvodina, Serbia

来源：

MODERN PHYSICS LETTERS B | 2015年 / 29卷 / 04期

关键词：

Ultrathin film; superlattice; phonons; thermodynamics; conductivity; THERMAL-CONDUCTIVITY; THERMODYNAMICS;

D O I：

10.1142/S0217984915500086

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The paper presents the innovated method of two-time dependent Green's functions applied to the bounded and translational perturbed systems. Film-structures and super-lattices were analyzed by employing the phonon spectra for the calculation of relevant thermodynamic characteristics. Free energy and the internal energy of the system were found as well as the temperature behavior of layered structures. Heat capacitances of these nanostructures were compared to bulk ones. It was shown that heat capacitances of nanolayered structures in low-temperature region were higher than the same quantities of the corresponding bulk sample. In the middle and the highest temperature region, temperature behavior was inverse: heat capacitance of layered structures was lower than of the corresponding bulk ones. The consequences were discussed with relation to the ( super) conductive properties of nanomaterials.

引用

页数：13

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