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Anomalous electric conductions in KSbO3-type metallic rhenium oxides

Hirotake Suzuki·Hiromi Ozawa·Hirohiko Sato
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Abstract

Single crystals of KSbO3-type rhenium oxides, La4Re6O$19, Pb6Re6O19, Sr2Re3O9 and Bi3Re3O11, were synthesized by a hydrothermal method. Their crystal structures can be regarded as a network of three-dimensional orthogonal-dimer lattice of edge-shared ReO6 octahedra. All of them exhibit small magnitude of Pauli paramagnetism, indicating metallic electronic states without strong electron correlations. The resistivity of these rhenates, except Bi3Re3O11, have a temperature dependence of $rho(T)=ρ_{0}+AT^{n}$ $(n \approx 1.6)$ in a wide temperature range between 5 K and 300 K, which is extraordinary for three-dimensional metals without strong electron correlations. The resistivity of Bi3Re3O11 shows an anomaly around at 50 K, where the magnetic susceptibility also detects a deviation from ordinary Pauli paramagnetism.

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Hirotake Suzuki, Hiromi Ozawa, Hirohiko Sato. 2007-02-20. Anomalous electric conductions in KSbO3-type metallic rhenium oxides. https://doi.org/10.1143/jpsj.76.044805

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