<div class="csl-bib-body">
<div class="csl-entry">Lee, H. G., Wang, L., Si, L., He, X., Porter, D. G., Kim, J. R., Ko, E. K., Kim, J., Park, S. M., Kim, B., Wee, A. T. S., Bombardi, A., Zhong, Z., & Noh, T. W. (2020). Atomic‐Scale Metal-Insulator Transition in SrRuO₃ Ultrathin Films Triggered by Surface Termination Conversion. <i>Advanced Materials</i>, <i>32</i>(8), Article 1905815. https://doi.org/10.1002/adma.201905815</div>
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dc.identifier.issn
0935-9648
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/144110
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dc.description.abstract
The metal–insulator transition (MIT) in transition-metal-oxide is fertile ground for exploring intriguing physics and potential device applications. Here, an atomic-scale MIT triggered by surface termination conversion in SrRuO₃ ultrathin films is reported. Uniform and effective termination engineering at the SrRuO₃(001) surface can be realized via a self-limiting water-leaching process. As the surface termination converts from SrO to RuO₂, a highly insulating and nonferromagnetic phase emerges within the topmost SrRuO₃ monolayer. Such a spatially confined MIT is corroborated by systematic characterizations on electrical transport, magnetism, and scanning tunneling spectroscopy. Density functional theory calculations and X-ray linear dichroism further suggest that the surface termination conversion breaks the local octahedral symmetry of the crystal field. The resultant modulation in 4d orbital occupancy stabilizes a nonferromagnetic insulating surface state. This work introduces a new paradigm to stimulate and tune exotic functionalities of oxide heterostructures with atomic precision.
en
dc.language.iso
en
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dc.publisher
WILEY-V C H VERLAG GMBH
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dc.relation.ispartof
Advanced Materials
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dc.subject
Mechanical Engineering
en
dc.subject
Mechanics of Materials
en
dc.subject
General Materials Science
en
dc.title
Atomic‐Scale Metal-Insulator Transition in SrRuO₃ Ultrathin Films Triggered by Surface Termination Conversion