We have grown single crystals of electron doping system Ca2-xLaxRuO4 (0.00 <= x <= 0.20) by a floating zone method. The first order metal/non-metal transition and canted antiferromagnetic ordering occur for 0.00 < x < 0.15, similar to those in the bandwidth controlled system Ca2-xSrxRuO4 (CSRO). However, comparing with CSRO, we found a rather different metallic ground state adjacent to the non-metallic ground state with canted antiferromagnetic order. Instead of short-range antiferromagnetic correlation found in CSRO (0.20 <= x < 0.50), the metallic ground state of the present system is characterized by strong ferromagnetic correlation.
@article{arxiv.cond-mat/0008331,
title = {Filling Control of the Mott Insulator Ca2RuO4},
author = {Hideto Fukazawa and Yoshiteru Maeno},
journal= {arXiv preprint arXiv:cond-mat/0008331},
year = {2009}
}
Comments
8 pages, 8 figures (eps), submitted to J. Phys. Soc. Jpn