Phonon Contribution in Thermodynamics of Nano-Crystalline Films and Wires
2009
Аутори
Šetrajčić, Jovan P.Mirjanić, D. Lj
Vučenović, Siniša M.
Ilić, Dušan I.
Markoski, Branko
Jaćimovski, Stevo
Sajfert, Vjekoslav D.
Zorić, Vojkan M.
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
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.
Извор:
Acta physica polonica A, 2009, 115, 4, 778-782Издавач:
- Polish Acad Sciences Inst Physics, Warsaw
Финансирање / пројекти:
- Унапређивање физичких карактеристика наноструктурних материјала (RS-MESTD-MPN2006-2010-141044)
DOI: 10.12693/APhysPolA.115.778
ISSN: 0587-4246