Momentum Distribution of Valence Electrons in a Single Al-Li-Cu Icosahedral Quasicrystal

Autor:	Susumu Nanao, Toshiaki Iwazumi, Nobuhiko Sakai, Hiroshi Kawata, Nobuhiro Shiotani, Yoshikazu Tanaka, Yoshiharu Sakurai, Masahisa Ito
Rok vydání:	1994
Předmět:	Physics Condensed matter physics Astrophysics::High Energy Astrophysical Phenomena Fermi level Compton scattering General Physics and Astronomy Quasicrystal Electronic structure Electron Momentum symbols.namesake symbols Valence electron Anisotropy
Zdroj:	Journal of the Physical Society of Japan. 63:3349-3355
ISSN:	1347-4073 0031-9015
Popis:	A single Al 59.3 Li 29.3 Cu 11.4 icosahedral quasicrystal is prepared with the Bridgman method. To study the electronic structure of this phase, high resolution Compton profiles along the axes of the five- and two-fold symmetries of the single quasicrystal phase have been measured with 60-keV synchrotron radiation X-rays. The Fermi cutoffs are observed clearly in the profiles. Anisotropy in the electron momentum distribution is not found. Although the valence electron profiles can be fitted with an inverted parabola, the free-electron model does not explain the shape of profiles and the momentum values of the Fermi cutoffs. Based on a concept of the quasi-Brillouin zone boundary the effects of strong electron-lattice interaction on the electron momentum distribution have been examined.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c96fadff67b9262f00d001d8d5a5d75c https://doi.org/10.1143/jpsj.63.3349 Zobrazit plný text záznamu