Comparative study of the heat capacity of icosahedral quasicrystals in solid and liquid states

Autor:	K. I. Grushevskii, N. I. Shchegolikhina, A. B. Gaiduchenko, A. F. Prekul
Rok vydání:	2011
Předmět:	Materials science Solid-state physics PD-MN Orbital hybridisation Icosahedral symmetry TEMPERATURE SPECIFIC-HEAT Quasicrystal Thermodynamics Electronic structure Condensed Matter Physics Heat capacity Electronic Optical and Magnetic Materials CO Melting point AL-CU-FE Pseudogap
Zdroj:	Physics of the solid state
ISSN:	1090-6460 1063-7834
DOI:	10.1134/s1063783411100246
Popis:	This study was supported by the Russian Foundation for Basic Research (project no. 10-02-00602-a). The heat capacity of icosahedral quasicrystals Al63Cu25Fe12 and Al62Cu25.5Fe12.5 has been studied at high temperatures up to 1700 K, which is by almost 400 K higher than the melting point of the material. It has been shown that the melt exhibits an excess heat capacity with respect to that determined by the Dulong-Petit law and that is a direct extension of the excess heat capacity of the solid state. It has been concluded that the excess heat capacity is related, as a whole, to the short-range order in the quasicrystal structure. This circumstance allows the identification of the orbital hybridization as the most probable mechanism of formation of the pseudogap in the electronic structure of the quasicrystals.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e4905bf154cae9e0cdcc262dcd5012d5 https://doi.org/10.1134/s1063783411100246 Zobrazit plný text záznamu Full text from SpringerLink