Suppression of magnetic ordering in XXZ-type antiferromagnetic monolayer NiPS3

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Title
Suppression of magnetic ordering in XXZ-type antiferromagnetic monolayer NiPS3
Author(s)
Kangwon Kim; Soo Yeon Lim; Jae-Ung Lee; Sungmin Lee; Tae Yun Kim; Kisoo Park; Gun Sang Jeon; Cheol-Hwan Park; Je-Geun Park; Hyeonsik Cheong
Publication Date
2019-01
Journal
NATURE COMMUNICATIONS, v.10, no.1, pp.345 -
Publisher
NATURE PUBLISHING GROUP
Abstract
How a certain ground state of complex physical systems emerges, especially in two-dimensional materials, is a fundamental question in condensed-matter physics. A particularly interesting case is systems belonging to the class of XY Hamiltonian where the magnetic order parameter of conventional nature is unstable in two-dimensional materials leading to a Berezinskii−Kosterlitz−Thouless transition. Here, we report how the XXZ-type antiferromagnetic order of a magnetic van der Waals material, NiPS3, behaves upon reducing the thickness and ultimately becomes unstable in the monolayer limit. Our experimental data are consistent with the findings based on renormalization-group theory that at low temperatures a two-dimensional XXZ system behaves like a two-dimensional XY one, which cannot have a long-range order at finite temperatures. This work provides the experimental examination of the XY magnetism in the atomically thin limit and opens opportunities of exploiting these fundamental theorems of magnetism using magnetic van der Waals materials. © 2019, The Author(s)
URI
https://pr.ibs.re.kr/handle/8788114/5746
ISSN
2041-1723
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
Files in This Item:
2019-267_Suppression of magnetic ordering in XXZ-type antiferromagnetic monolayer NiPS3.pdfDownload

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