Abstract
We report on measurements of the temperature dependence of resistivity, ρ(T), for single-crystal samples of ZrB12, ZrB2, and polycrystalline samples of MgB2. It is shown that the cluster compound ZrB12 behaves as a simple metal in the normal state, with a typical Bloch-Grüneisen ρ(T) dependence. However, the resistive Debye temperature, T R=300 K, is three times smaller than T D obtained from specific heat data. We observe the T 2 term in ρ(T) of all these borides, which could be interpreted as an indication of strong electron-electron interaction.
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From Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 80, No. 5, 2004, pp. 376–380.
Original English Text Copyright © 2004 by Gasparov, Kulakov, Sidorov, Zver’kova, Filipov, Lyashenko, Paderno.
This article was submitted by the author in English.