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09 February 2025
 
  » arxiv » 1109.0234

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Evidence for charge and orbital order in the doped titanates RE_(1-x)Ca_xTiO_3 (RE=Y, Er, Lu)
A. C. Komarek ; M. Reuther ; T. Lorenz ; A. Cousson ; P. Link ; W. Morgenroth ; D. Trots ; C. Baehtz ; M. Braden ;
Date 1 Sep 2011
AbstractCombining macroscopic and diffraction methods we have studied the electric, magnetic and struc- tural properties of RE_(1-x)Ca_xTiO_3 (RE=Y, Er, Lu) focusing on the concentration range near the metal-insulator transition. The insulating phase, which is stabilized by a smaller rare-earth ionic ra- dius, exhibits charge order with a predominant occupation of the dxy orbital. The charge and orbital ordering explains the broad stability range of the insulating state in RE_(1-x)Ca_xTiO_3 with smaller rare-earth ions. The strong modulation of the Ti-O bond distances indicates sizeable modulation of the electric charge.
Source arXiv, 1109.0234
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