Change in the Thermodynamic Properties of a Si-Ge Solid Solution at a Decrease of the Nanocrystal Size

被引：7

作者：

Magomedov, M. N. ^{[1
]}

机构：

[1] Russian Acad Sci, Dagestan Sci Ctr, Inst Geothermal Res, Makhachkala 367030, Russia

来源：

PHYSICS OF THE SOLID STATE | 2019年 / 61卷 / 11期

基金：

俄罗斯基础研究基金会;

关键词：

nanocrystal; isochore; isobar; silicon; germanium; THERMAL-PROPERTIES; ELASTIC PROPERTIES; SILICON; GERMANIUM; SURFACE; TEMPERATURE; MODULUS; EXPANSION; PRESSURE; DIAMOND;

D O I：

10.1134/S1063783419110210

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The equation of state and the thermodynamic properties of the substitutional solid solution Si0.5Ge0.5 are calculated in the framework of the " medium atom" model. The changes in the equation of state and the thermodynamic properties upon the transition from a macrocrystal to a nanocrystal of 222 atoms with the geometric Gibbs surface are calculated using the RP-model of nanocrystal. The calculations have been performed along isotherms T = 100, 300, and 1000 K in the pressure range -1< P < 7 GPa. The changes in the properties is studied at the isochoric and also isobaric (P = 0) decrease of the number of atoms in the nanocrystal. It is shown that, at the isobaric (P = 0) decrease in the size, the specific volume of the Si-0.5-Ge-0.5 nanocrystal increases the more significantly, the higher the nanocrystal temperature.

引用

页码：2145 / 2154

页数：10

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