Synthesis, Structure, and Properties of New Perovskite PbVO3

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• 作者：Roman V. Shpanchenko ; Viktoria V. Chernaya ; Alexander A. Tsirlin ; Pavel S. Chizhov ; Dmitry E. Sklovsky ; Evgeny V. Antipov ; Evgeny P. Khlybov ; Vladimir Pomjakushin ; Anatoly M. Balagurov ; Julia E. Medve
• 刊名：Chemistry of Materials
• 出版年：2004
• 出版时间：August 24, 2004
• 年：2004
• 卷：16
• 期：17
• 页码：3267 - 3273
• 全文大小：177K
• 年卷期：v.16,no.17(August 24, 2004)
• ISSN：1520-5002

文摘

The new perovskite PbVO₃ was synthesized under high-temperature and high-pressureconditions. Its crystal structure (a = 3.80005(6) Å, c = 4.6703(1) Å, Z = 1, S.G. P4mm)contains isolated layers of corner-shared VO₅ pyramids, which are formed instead ofoctahedra due to a strong tetragonal distortion (c/a = 1.23). The lead atom is shifted out ofthe center of the unit cell toward one of two [VO₂]-layers due to the influence of the lonepair. This new perovskite exhibits a semiconductor-like s/gifchars/rho.gif" BORDER=0 >(T) dependence down to 2 K. Thisbehavior can be qualitatively explained by taking into account strong electron correlationsin electronic structure calculations.