Phonon-Induced Thermodynamic Properties of Ultra-narrow Wires |
| D.I. Ilića, J.P. Šetrajčić b, and S.K. Jaćimovski c
aUniversity of Novi Sad, Faculty of Technical Sciences, Serbia bUniversity of Novi Sad, Faculty of Sciences, Department of Physics, Serbia cAcademy of Criminalistic and Police Studies, Belgrade, Serbia |
| Received: April 1, 2017;in final form: December 20, 2017 |
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| In this paper, we investigated the influence of size effect on thermodynamic pro-per-ti-es of ultra-narrow wires with a simple cubic lattice, by means of two-time dependent Green functions method, adjusted to confined crystalline structures. Poles of Green functions, which defining phonon spectra, are found by solving the secular equation. For different boundary parameters, this problem is presented graphically. The temperature behavior of ultra-narrow wire thermal capacitance is compared to that of bulk structures. It turned out that in low-temperature region thermal capacitance of the ultra-narrow wire is notably lower than in the corresponding bulk sample. How this fact reflects the thermal, conducting and superconducting properties of materials, is discussed in the conclusion. |
DOI: 10.12693/APhysPolA.133.57 Topics: Phonons, ultra-narrow wire, the Green function, thermodynamics, specific heat |