Orbiton-mediated multiphonon scattering in La1xSrxMnO3

K.-Y. Choi, P. Lemmens, G. Güntherodt, Yu. G. Pashkevich, V. P. Gnezdilov, P. Reutler, L. Pinsard-Gaudart, B. Büchner, and A. Revcolevschi
Phys. Rev. B 72, 024301 – Published 14 July 2005

Abstract

We report on Raman scattering measurements of single crystalline La1xSrxMnO3 (x=0, 0.06, 0.09, and 0.125), focusing on the high-frequency regime. We observe multiphonon scattering processes up to fourth order which show distinct features: (i) anomalies in peak energy and its relative intensity and (ii) a pronounced temperature, polarization, and doping dependence. These features suggest a mixed orbiton-phonon nature of the observed multiphonon Raman spectra.

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  • Received 14 December 2004

DOI:https://doi.org/10.1103/PhysRevB.72.024301

©2005 American Physical Society

Authors & Affiliations

K.-Y. Choi1,2, P. Lemmens3,4, G. Güntherodt2, Yu. G. Pashkevich5, V. P. Gnezdilov6, P. Reutler7,8, L. Pinsard-Gaudart8, B. Büchner7, and A. Revcolevschi8

  • 1Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai 980-8577, Japan
  • 2II. Physikalisches Institut, RWTH Aachen, 52056 Aachen, Germany
  • 3Max Planck Institute for Solid State Research, D-70569 Stuttgart, Germany
  • 4Institute for Physics of Condensed Matter, TU Braunschweig, D-38106 Braunschweig, Germany
  • 5A. A. Galkin Donetsk Phystech NASU, 83114 Donetsk, Ukraine
  • 6B. I. Verkin Institute for Low Temperature Physics NASU, 61164 Kharkov, Ukraine
  • 7Institute for Solid State Research, IFW Dresden, D-01171 Dresden, Germany
  • 8Laboratoire de Physico-Chimie, Université Paris-Sud, 91405 Orsay, France

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Vol. 72, Iss. 2 — 1 July 2005

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