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Pis'ma v Zh. Èksper. Teoret. Fiz., 2011, Volume 94, Issue 10, Pages 811–815 (Mi jetpl2385)  

This article is cited in 5 scientific papers (total in 5 papers)

CONDENSED MATTER

Electron transport in FeBO$_3$ ferroborate at ultrahigh pressures

I. A. Trojanab, A. G. Gavriliukac, S. G. Ovchinnikovde, I. S. Lyubutina, N. V. Kazakd

a Institute of Cristallography RAS
b Max Planck Institute for Chemistry, Mainz
c Institute for High Pressure Physics, Russian Academy of Sciences
d L. V. Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences
e Siberian Federal University, Krasnoyarsk

Abstract: The electrical resistance of FeBO$_3$ crystals at high and ultrahigh pressures (up to $198$ GPa) and low temperatures has been measured using diamond anvil cells. It has found that in the high-pressure phase, $46<P<100 $GPa, the activation energy $E_ac$ decreases gradually from $0.55$ to $0.3$ eV according to a linear law. Its extrapolation to zero gives an estimated value of about $210$ GPa for the pressure at which complete metallization is expected. However, above $100$ GPa, the linear $E_ac(P)$E dependence smoothly transforms to a nonlinear one. At the same time, the temperature dependence of the electrical resistance at fixed pressure significantly deviates from the Arrhenius activation law and does not obey the Mott law for the hopping conductivity. Experimental data demonstrate the dependence of the activation energy $E_ac$ both on pressure and temperature. At $T = 0$, the gap tends to zero. Theoretical analysis shows that the decrease in $E_ac$ upon cooling can be interpreted in terms of the transition of the low-spin FeBO$_3$ phase to the magnetically ordered (antiferromagnetic) state.

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English version:
Journal of Experimental and Theoretical Physics Letters, 2011, 94:10, 748–752

Bibliographic databases:

Received: 17.10.2011

Citation: I. A. Trojan, A. G. Gavriliuk, S. G. Ovchinnikov, I. S. Lyubutin, N. V. Kazak, “Electron transport in FeBO$_3$ ferroborate at ultrahigh pressures”, Pis'ma v Zh. Èksper. Teoret. Fiz., 94:10 (2011), 811–815; JETP Letters, 94:10 (2011), 748–752

Citation in format AMSBIB
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\by I.~A.~Trojan, A.~G.~Gavriliuk, S.~G.~Ovchinnikov, I.~S.~Lyubutin, N.~V.~Kazak
\paper Electron transport in FeBO$_3$ ferroborate at ultrahigh pressures
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2011
\vol 94
\issue 10
\pages 811--815
\mathnet{http://mi.mathnet.ru/jetpl2385}
\elib{http://elibrary.ru/item.asp?id=17239364}
\transl
\jour JETP Letters
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\issue 10
\pages 748--752
\crossref{https://doi.org/10.1134/S0021364011220115}
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  •       Pis'ma v Zhurnal ksperimental'noi i Teoreticheskoi Fiziki
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