Phonon Contribution in Thermodynamics of Nano-Crystalline Films and Wires
2009
Autori
Šetrajčić, Jovan P.Mirjanić, D. Lj
Vučenović, Siniša M.
Ilić, Dušan I.
Markoski, Branko
Jaćimovski, Stevo
Sajfert, Vjekoslav D.
Zorić, Vojkan M.
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Spectra of possible phonon states, as well as thermodynamic characteristics of nanocrystals (ultrathin film and quantum wire) of simple cubic crystalline structure are analyzed in this paper, using the method of two-time dependent Green functions. From energy spectra and internal energy of the system the thermal capacitance of these structures in low temperature region is found. The temperature behavior of specific heat is compared to that of corresponding bulk structure. It is shown that at extremely low temperatures thermal capacitance of quantum wire is considerably lower than the thermal capacitance 4 film as well as the bulk sample. Consequences of this fact are discussed in detail and its influence to thermodynamic properties of materials is estimated.
Izvor:
Acta physica polonica A, 2009, 115, 4, 778-782Izdavač:
- Polish Acad Sciences Inst Physics, Warsaw
Finansiranje / projekti:
- Unapređivanje fizičkih karakteristika nanostrukturnih materijala (RS-MESTD-MPN2006-2010-141044)
DOI: 10.12693/APhysPolA.115.778
ISSN: 0587-4246