| What drives the insulating state in ultrathin films of SrRuO3? (2008) | |||||||||
Abstract | |||||||||
| Using density functional calculations we investigate the microscopic mechanisms behind the insulating state of ultra thin films of SrRuO3 grown on SrTiO3. We find that a combination of electron correlation and unusual structural distortions bringing about crystal field anisotropies very different from the bulk responsible for the ensuing insulating antiferromagnetic (AFM) ordering in the otherwise metallic ferromagnetic SrRuO3. A significant role is played by an unusual spin state transition at the surface in stabilising the unusual electronic structure at the ultrathin limit.. Comment: 4 pages of text; 4 figures | |||||||||
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