Raman scattering study of Ru(Sr,La)2GdCu2O8

V. Damljanović, C. Ulrich, C. Bernhard, B. Keimer, P. Mandal, A. Krimmel, and A. Loidl
Phys. Rev. B 73, 172502 – Published 12 May 2006

Abstract

We present a Raman scattering study of Ru(Sr1xLax)2GdCu2O8, a material that exhibits coexisting magnetic order and high-temperature superconductivity for x=0, but becomes semiconducting for x=0.1. A pronounced anomaly of an oxygen vibration at the magnetic transition temperature evolves smoothly through the superconductor-semiconductor transition. In contrast, a previously observed, broad low-energy mode disappears rapidly with increasing x, mirroring the rapid hole-concentration dependence of the net magnetization in the magnetically ordered state. We discuss these findings as possible indications of spin, charge, and orbital order of the Ru ions.

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  • Received 6 March 2006

DOI:https://doi.org/10.1103/PhysRevB.73.172502

©2006 American Physical Society

Authors & Affiliations

V. Damljanović, C. Ulrich, C. Bernhard, and B. Keimer

  • Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany

P. Mandal

  • Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Calcutta 700064, India

A. Krimmel and A. Loidl

  • Experimental Physics V, Center for Electronic Correlations and Magnetism, Augsburg University, D-86159 Augsburg, Germany

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Issue

Vol. 73, Iss. 17 — 1 May 2006

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