Evidence of Spin Frustration in a Vanadium Diselenide Monolayer Magnet

Evidence of Spin Frustration in a Vanadium Diselenide Monolayer Magnet

© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 31(2019), 23 vom: 16. Juni, Seite e1901185
1. Verfasser: Wong, Ping Kwan Johnny (VerfasserIn)
Weitere Verfasser: Zhang, Wen, Bussolotti, Fabio, Yin, Xinmao, Herng, Tun Seng, Zhang, Lei, Huang, Yu Li, Vinai, Giovanni, Krishnamurthi, Sridevi, Bukhvalov, Danil W, Zheng, Yu Jie, Chua, Rebekah, N'Diaye, Alpha T, Morton, Simon A, Yang, Chao-Yao, Ou Yang, Kui-Hon, Torelli, Piero, Chen, Wei, Goh, Kuan Eng Johnson, Ding, Jun, Lin, Minn-Tsong, Brocks, Geert, de Jong, Michel P, Castro Neto, Antonio H, Wee, Andrew Thye Shen
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2019
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article 2D materials monolayer magnet spin frustration van der Waals epitaxy vanadium diselenide
Beschreibung
Zusammenfassung:© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Monolayer VSe2 , featuring both charge density wave and magnetism phenomena, represents a unique van der Waals magnet in the family of metallic 2D transition-metal dichalcogenides (2D-TMDs). Herein, by means of in situ microscopy and spectroscopic techniques, including scanning tunneling microscopy/spectroscopy, synchrotron X-ray and angle-resolved photoemission, and X-ray absorption, direct spectroscopic signatures are established, that identify the metallic 1T-phase and vanadium 3d1 electronic configuration in monolayer VSe2 grown on graphite by molecular-beam epitaxy. Element-specific X-ray magnetic circular dichroism, complemented with magnetic susceptibility measurements, further reveals monolayer VSe2 as a frustrated magnet, with its spins exhibiting subtle correlations, albeit in the absence of a long-range magnetic order down to 2 K and up to a 7 T magnetic field. This observation is attributed to the relative stability of the ferromagnetic and antiferromagnetic ground states, arising from its atomic-scale structural features, such as rotational disorders and edges. The results of this study extend the current understanding of metallic 2D-TMDs in the search for exotic low-dimensional quantum phenomena, and stimulate further theoretical and experimental studies on van der Waals monolayer magnets
Beschreibung:Date Revised 30.09.2020
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.201901185