Orbital ordering transition in La4Ru2O10

被引：97

作者：

Khalifah, P

Osborn, R

Huang, Q

Zandbergen, HW

Jin, R

Liu, Y

Mandrus, D

Cava, RJ

机构：

[1] Princeton Univ, Dept Chem, Princeton, NJ 08540 USA

[2] Princeton Univ, Princeton Mat Inst, Princeton, NJ 08540 USA

[3] Argonne Natl Lab, Div Sci Mat, Argonne, IL 60439 USA

[4] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[5] Univ Maryland, Dept Mat & Nucl Engn, College Pk, MD 20742 USA

[6] Delft Univ Technol, Natl Ctr High Resolut Electron Microscopy, NL-2628 AL Delft, Netherlands

[7] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

[8] Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA

来源：

SCIENCE | 2002年 / 297卷 / 5590期

关键词：

D O I：

10.1126/science.1075556

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

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.

引用

页码：2237 / 2240

页数：5

共 16 条

[1] Orbital-selective Mott-insulator transition in Ca2-xSrxRuO4 [J].