Calculations of the Thermal Conductivity of Si1-xGex Films with Nonuniform Composition
Journal Title: Фізика і хімія твердого тіла - Year 2018, Vol 19, Issue 1
Abstract
SiGe films have attracted much attention recently due to experimental demonstrations of improved thermoelectric properties over those of the corresponding bulk material. However, despite this increasing attention, available information on the thermoelectric properties of Si1-xGex films is quite limited, especially for nonuniform composition in wide temperature interval. In this paper we have used the Boltzmann equation under the relaxation-time approximation to calculate the thermal conductivity of Si1-xGex films with nonuniform composition. It is confirmed that SiGe films with nonuniform composition has significantly lower thermal conductivity than its uniform counterpart. This suggests that an improvement in thermoelectric properties is possible by using the SiGe films with nonuniform distribution of germanium.
Authors and Affiliations
V. V Kuryliuk, O. M. Krit
Effect of Pulsed Current Parameters on the Structure of Amorphous Co-W Alloys and Their Thermal Stability
Methods of X-ray diffraction and differential thermal analysis is investigated of the structure and thermal stability Co-W alloys of electrodeposition at current and pulse currents. It was found the influence of modes of...
Calculations of the Thermal Conductivity of Si1-xGex Films with Nonuniform Composition
SiGe films have attracted much attention recently due to experimental demonstrations of improved thermoelectric properties over those of the corresponding bulk material. However, despite this increasing attention, availa...
Antifriction Properties of Carbon Fibers and Carbon Textiles (Review)
By results of researches of influence orientational effects on the antifriction properties of carboplastic and mechanism of wear of unidirectional carboplastics have been made a review. Anisotropy of properties of unidir...
Methods of Heat Capacity Measurements of Crystal (Review)
The analysis of the basic methods of heat capacity measurements of solids and construction schemes of devices for implementation these techniques have been shown. The general theoretical and empirical formulas allow to q...
Interaction and Optical Properties of Specimens in Sb2S3 - Ge System
General character of interaction of Sb2S3 with elemental Germanium resulting in formation of the glass - manocrystal composite is established. Sufficient shift of the borders of optical transparency domain of the composi...