凝聚态物理
超导电性
过渡金属
可见的
电阻率和电导率
散射
物理
化学
量子力学
生物化学
催化作用
作者
Peter G. Khalifah,R. Osborn,Q. Huang,H.W. Zandbergen,Rongying Jin,Y. Liu,David Mandrus,R. J. Cava
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2002-09-27
卷期号:297 (5590): 2237-2240
被引量:107
标识
DOI:10.1126/science.1075556
摘要
We report experimental evidence for a full orbital ordering transition in the two-dimensional lanthanum ruthenate La4Ru2O10. The observable consequences of this orbital ordering include the loss of the Ru local moment, a structural distortion which partitions Ru-O bonds into axially oriented short and long sets, a sharp jump in electrical resistivity, and the opening of a spin gap that is visible in neutron scattering experiments. This is a rare example of a discrete orbital ordering transition in a 4d transition metal oxide and demonstrates that orbital effects can have an influence on the properties of layered ruthenates, a family of compounds that notably includes the p-wave superconductor Sr2RuO4 and the field-tuned quantum critical metamagnet Sr3Ru2O7.
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