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Observation of metallic electronic structure in a single-atomic-layer oxide

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Title
Observation of metallic electronic structure in a single-atomic-layer oxide
Author(s)
Byungmin Sohn; Jeong Rae Kim; Choong H. Kim; Lee, Sangmin; Sungsoo Hahn; Younsik Kim; Soonsang Huh; Donghan Kim; Youngdo Kim; Wonshik Kyung; Minsoo Kim; Miyoung Kim; Noh, Tae Won; Changyoung Kim
Publication Date
2021-10-26
Journal
Nature Communications, v.12, no.1
Publisher
Nature Research
Abstract
© 2021, The Author(s).Correlated electrons in transition metal oxides exhibit a variety of emergent phases. When transition metal oxides are confined to a single-atomic-layer thickness, experiments so far have shown that they usually lose diverse properties and become insulators. In an attempt to extend the range of electronic phases of the single-atomic-layer oxide, we search for a metallic phase in a monolayer-thick epitaxial SrRuO3 film. Combining atomic-scale epitaxy and angle-resolved photoemission measurements, we show that the monolayer SrRuO3 is a strongly correlated metal. Systematic investigation reveals that the interplay between dimensionality and electronic correlation makes the monolayer SrRuO3 an incoherent metal with orbital-selective correlation. Furthermore, the unique electronic phase of the monolayer SrRuO3 is found to be highly tunable, as charge modulation demonstrates an incoherent-to-coherent crossover of the two-dimensional metal. Our work emphasizes the potentially rich phases of single-atomic-layer oxides and provides a guide to the manipulation of their two-dimensional correlated electron systems.
URI
https://pr.ibs.re.kr/handle/8788114/10876
DOI
10.1038/s41467-021-26444-z
ISSN
2041-1723
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
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