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Suppression of magnetic ordering in XXZ-type antiferromagnetic monolayer NiPS3

Cited 262 time in Web of Science Cited 264 time in Scopus
Authors

Kim, Kangwon; Lim, Soo Yeon; Lee, Jae-Ung; Lee, Sungmin; Kim, Tae Yun; Park, Kisoo; Jeon, Gun Sang; Park, Cheol-Hwan; Park, Je-Geun; Cheong, Hyeonsik

Issue Date
2019-01
Publisher
Nature Publishing Group
Citation
Nature Communications, Vol.10 No.1, p. 345
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 anti-ferromagnetic 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.
ISSN
2041-1723
URI
https://hdl.handle.net/10371/202224
DOI
https://doi.org/10.1038/s41467-018-08284-6
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  • College of Natural Sciences
  • Department of Physics and Astronomy
Research Area Condensed Matter Physics, Nanoscale Photonics, Nanoscale Physics, 나노 물리와 나노 광자학, 응집 물질 물리

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