Structural and insulator-to-metal phase transition at 50 GPa in GdMnO3

Details Structural and insulator-to-metal phase transition at 50 GPa in GdMnO3 Structural and insulator-to-metal phase transition at 50 GPa in GdMnO3

2011-11-21

arxiv.org/abs/1111.4855v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures and 2 tables

Scientific paper

We present a study of the effect of very high pressure on the orthorhombic perovskite GdMnO3 by Raman spectroscopy and synchrotron x-ray diffraction up to 53.2 GPa. The experimental results yield a structural and insulator-to-metal phase transition close to 50 GPa, from an orthorhombic to a metrically cubic structure. The phase transition is of first order with a pressure hysteresis of about 6 GPa. The observed behavior under very high pressure might well be a general feature in rare-earth manganites.

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