Аутори:
1. Душан Илић, Serbia
2. Siniša Vučenović, Republic of Srpska, Bosnia and Herzegovina
3. Стево Јаћимовски, 4. Јован Шетрајчић, Академија наука и умјетности Републике Српске, Serbia

Апстракт:
Phonon spectra and states in spatially very confined structures in one dimension – crystalline ultrathin – nanofilms were studied as a continuation of research on quasi two-dimensional systems. A comparison was made with the corresponding quantities in unconfined (bulk) crystal structures. By solving the Hamilton equation of motion, a system of homogeneous differential equations was formulated for determining the amplitudes of small mechanical disturbances (phonons) that propagated through the observed system. From the conditions of non-triviality of the solution of this system of equations, the phonon dispersion law was obtained with the main characteristic – the appearance of energy gaps. In the model structure, acoustic phonon branches of the optical type arise as an exclusive consequence of the finite boundaries of the system. The gap sizes determine the different thermodynamic behavior of the film structures.

Кључне речи:
Ultrathin crystalline films,energy spectra,optical type of phonons.

Тематска област:
СИМПОЗИЈУМ А - Наука материје, кондензоване материје и физикa чврстог стања

Датум пријаве сажетка:
02.03.2026.

Конференцијa:
Contemporary Materials 2026 - Savremeni Materijali

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