Emergent electronic and magnetic state in Ca3Ru2O7 induced by Ti doping
Abstract
We report an emergent electronic and magnetic state in the bilayer ruthenate Ca3Ru2O7 upon doping with a small concentration of Ti on the Ru sites. In contrast to a quasi-two-dimensional metallic state in Ca3Ru2O7, which has an antiferromagnetic (AF) state formed by ferromagnetic (F) bilayers stacked antiferromagnetically along the c-axis, we find an insulating ground state with a “G”-type nearest-neighbor AF order in Ca3(Ru1-xTix)2O7 for x ≥ 0.03. The close proximity of these two distinct electronic and magnetic states demonstrates unique competing magnetic interactions in Ca3Ru2O7, which provides a rare opportunity to investigate the interplay between correlated metal physics and Mott physics.
- Publication:
-
Physical Review B
- Pub Date:
- November 2011
- DOI:
- Bibcode:
- 2011PhRvB..84t1102K
- Keywords:
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- 71.27.+a;
- 71.15.Mb;
- 71.30.+h;
- 75.25.-j;
- Strongly correlated electron systems;
- heavy fermions;
- Density functional theory local density approximation gradient and other corrections;
- Metal-insulator transitions and other electronic transitions