Phonon Contribution in Thermodynamics and Transport Properties of Ultrathin Ceramic Films
Apstrakt
The dispersion law, density states of phonons, thermodynamics properties and thermal conductivity was analyzed in this paper. It has been shown that at low temperatures, thermal conductivity of thin film is considerably lower that of bulk-structure. It turned out that phonons in thin film require activation energy for exciting. This leads to extremely low specific heat and specific conductivity at low temperatures. Consequences of quoted facts were discussed in detail and their influence on kinetic and thermodynamic properties of thin films is estimated.
Izvor:
Acta physica polonica A, 2014, 126, 3, 811-819Izdavač:
- Polish Acad Sciences Inst Physics, Warsaw
Finansiranje / projekti:
- Dizajniranje i modelovanje specifičnih osobina nanostrukturnih uzoraka (RS-171039)
- Inoviranje forenzičkih metoda i njihova primena (RS-34019)
- Ministry of Science and Technological Development of the Republic of Srpska
- Provincial Secretariat for High Education, Science and Technological Development of Vojvodina
DOI: 10.12693/APhysPolA.126.811
ISSN: 0587-4246