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Park, Jae Whan
원자제어 저차원 전자계 연구단
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Zoology of domain walls in quasi-2D correlated charge density wave of 1T-TaS2

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Title
Zoology of domain walls in quasi-2D correlated charge density wave of 1T-TaS2
Author(s)
Jae Whan Park; Jinwon Lee; Han Woong Yeom
Publication Date
2021-03
Journal
npj Quantum Materials, v.6, no.1
Publisher
Nature Research
Abstract
© 2021, The Author(s).Domain walls in correlated charge density wave compounds such as 1T-TaS2 can have distinct localized states which govern physical properties and functionalities of emerging quantum phases. However, detailed atomic and electronic structures of domain walls have largely been elusive. We identify using scanning tunneling microscope and density functional theory calculations the atomic and electronic structures for a plethora of discommensuration domain walls in 1T-TaS2 quenched metastably with nanoscale domain wall networks. The domain walls exhibit various in-gap states within the Mott gap but metallic states appear in only particular types of domain walls. A systematic understanding of the domain-wall electronic property requests not only the electron counting but also including various intertwined interactions such as structural relaxation, electron correlation, and charge transfer. This work guides the domain wall engineering of the functionality in correlated van der Waals materials.
URI
https://pr.ibs.re.kr/handle/8788114/9654
DOI
10.1038/s41535-021-00330-9
ISSN
2397-4648
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > 1. Journal Papers (저널논문)
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