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강상관계 물질 연구단
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Atomic-Scale Metal–Insulator Transition in SrRuO3 Ultrathin Films Triggered by Surface Termination Conversion

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Title
Atomic-Scale Metal–Insulator Transition in SrRuO3 Ultrathin Films Triggered by Surface Termination Conversion
Author(s)
Han Gyeol Lee; Lingfei Wang; Liang Si; Xiaoyue He; Daniel G. Porter; Jeong Rae Kim; Eun Kyo Ko; Jinkwon Kim; Sung Min Park; Bongju Kim; Andrew Thye Shen Wee; Alessandro Bombardi; Zhicheng Zhong; Tae Won Noh
Publication Date
2020-02
Journal
ADVANCED MATERIALS, v.32, no.8, pp.1905815 -
Publisher
WILEY-V C H VERLAG GMBH
Abstract
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, WeinheimThe 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
URI
https://pr.ibs.re.kr/handle/8788114/7008
ISSN
0935-9648
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
Files in This Item:
70893_Atomic-Scale Metal–Insulator Transition in SrRuO3 Ultrathin Films Triggered by Surface Termination Conversion.pdfDownload

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