Calculation of temperature dependence of electrical resistivity in the transuranium metals and their alloys

被引:15
作者
Tsiovkin, Yu. Yu.
Korotin, M. A.
Shorikov, A. O.
Anisimov, V. I.
Voloshinskii, A. N.
Lukoyanov, A. V.
Koneva, E. S.
Povzner, A. A.
Surin, M. A.
机构
[1] Russian Acad Sci, Ural Div, Inst Met Phys, Ekaterinburg 620041, Russia
[2] Moscow State Inst Radio Engn Elect & Automat, Moscow 119454, Russia
[3] Ural State Tech Univ, UPI, Ekaterinburg 620002, Russia
关键词
ELECTRONS; PU; PLUTONIUM;
D O I
10.1103/PhysRevB.76.075119
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The temperature dependence of electrical resistivity (ER) in fcc transuranium metals-plutonium, americium, and curium and some plutonium-based dilute alloys-has been considered within the Mott two-band conductivity model. It has been shown that the physical origin of the experimentally obtained temperature dependence of ER, including negative temperature coefficient of resistivity (TCR), is an ordinary electron-phonon interaction and its interference with electron-impurity interaction in the case of dilute alloys. A simple criterion of the negative TCR at high temperatures (T>theta(D)) was formulated and applied to explain qualitatively the experimental TCR data in Pu-based dilute alloys. To make numerical evaluation of ER of pure metals and their alloys at high temperature, the coherent potential approach for the Mott two-band conductivity model was combined with ab initio obtained fcc Pu, Am, and Cm densities of states as the starting point in the iteration procedure. The fcc curium LDA+U+SO density of states was reported and discussed in detail. The results of the ER theoretical investigations were compared with available experimental data.
引用
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页数:10
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