Orbital Ordering Transition in La 4 Ru 2 O 10-Reference-Cited by-同舟云学术

Orbital Ordering Transition in La 4 Ru 2 O 10

Published:2002-09-27 Issue:5590 Volume:297 Page:2237-2240
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Khalifah P.¹²,Osborn R.³,Huang Q.⁴⁵,Zandbergen H. W.²⁶,Jin R.⁷,Liu Y.⁷,Mandrus D.⁸,Cava R. J.¹²

Affiliation:

1. Department of Chemistry,

2. Princeton Materials Institute, Princeton University, Princeton, NJ 08540, USA.

3. Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.

4. NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.

5. Department of Materials and Nuclear Engineering, University of Maryland, College Park, MD 20742, USA.

6. National Center for High Resolution Electron Microscopy, Technical University of Delft, Rotterdamsweg 137, 2628AL Delft, The Netherlands.

7. Department of Physics, The Pennsylvania State University, University Park, PA 16802, USA.

8. Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.

Abstract

We report experimental evidence for a full orbital ordering transition in the two-dimensional lanthanum ruthenate La 4 Ru 2 O 10 . 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 4 d 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 Sr 2 RuO 4 and the field-tuned quantum critical metamagnet Sr 3 Ru 2 O 7 .

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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