Single crystals of KSbO3-type rhenium oxides, La4Re6O19,Pb6Re6O19,Sr2Re3O9andBi3Re3O11,weresynthesizedbyahydrothermalmethod.Theircrystalstructurescanberegardedasanetworkofthree−dimensionalorthogonal−dimerlatticeofedge−sharedReO6octahedra.AllofthemexhibitsmallmagnitudeofPauliparamagnetism,indicatingmetallicelectronicstateswithoutstrongelectroncorrelations.Theresistivityoftheserhenates,exceptBi3Re3O11,haveatemperaturedependenceofrho(T)=\rho_{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.
@article{arxiv.cond-mat/0702451,
title = {Anomalous electric conductions in KSbO3-type metallic rhenium oxides},
author = {Hirotake Suzuki and Hiromi Ozawa and Hirohiko Sato},
journal= {arXiv preprint arXiv:cond-mat/0702451},
year = {2009}
}
Comments
13 pages, 7 figures. J. Phys. Soc. Japan, in press