Open AccessГальваномагнитные свойства моносилицида кобальта и сплавов на его основе
Author(s) -
А.Ю. Овчинников,
П.П. Константинов,
Д.А. Пшенай-Северин,
А.Т. Бурков
Publication year - 2019
Publication title -
fizika i tehnika poluprovodnikov
Language(s) - English
Resource type - Journals
eISSN - 1726-7315
pISSN - 0015-3222
DOI - 10.21883/ftp.2019.06.47720.29
Subject(s) - condensed matter physics , electronic band structure , hall effect , materials science , fermi level , ab initio , isotropy , fermi energy , degenerate energy levels , electronic structure , conductivity , electrical resistivity and conductivity , nickel , cobalt , chemistry , physics , electron , metallurgy , quantum mechanics
In this work, we study the Hall coefficient and the conductivity of cobalt monosilide CoSi, as well as Co1−xFexSi and Co1−xNixCo alloys with contents up to 8 at% of iron and up to 5 at% of nickel. The temperature dependences of the Hall coefficient and of the conductivity were measured in the temperature range of 77−800K. The theoretical interpretation of the experimental dependencies is based on two different models of the electronic structure of the compound: a simple 2-band semimetallic structure with small overlap of isotropic parabolic bands; and ab initio electronic structure, containing near Fermi energy topological features with multiply degenerate intersections of bands.