Evidence of Spin Frustration in a Vanadium Diselenide Monolayer Magnet

Ping Kwan Johnny Wong, Wen Zhang, Fabio Bussolotti, Xinmao Yin, Tun Seng Herng, Lei Zhang, Yu Li Huang, Giovanni Vinai, Sridevi Krishnamurthi, Danil W. Bukhvalov, Yu Jie Zheng, Rebekah Chua, Alpha T. N'Diaye, Simon A. Morton, Chao Yao Yang, Kui Hon Ou Yang, Piero Torelli, Wei Chen, Kuan Eng Johnson Goh, Jun Ding & 5 others Minn Tsong Lin, Geert Brocks, Michel P. de Jong, Antonio H. Castro Neto, Andrew Thye Shen Wee

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number1901185
JournalAdvanced materials
Volume31
Issue number23
DOIs
Publication statusPublished - 6 Jun 2019

Fingerprint

Vanadium
Magnets
Monolayers
Transition metals
Charge density waves
X rays
Graphite
X ray absorption
Dichroism
Magnetism
Photoemission
Scanning tunneling microscopy
Synchrotrons
Magnetic susceptibility
Molecular beam epitaxy
Ground state
Microscopic examination
Spectroscopy
Magnetic fields

Keywords

  • UT-Hybrid-D
  • monolayer magnet
  • spin frustration
  • van der Waals epitaxy
  • vanadium diselenide
  • 2D materials

Cite this

Wong, P. K. J., Zhang, W., Bussolotti, F., Yin, X., Herng, T. S., Zhang, L., ... Wee, A. T. S. (2019). Evidence of Spin Frustration in a Vanadium Diselenide Monolayer Magnet. Advanced materials, 31(23), [1901185]. https://doi.org/10.1002/adma.201901185
Wong, Ping Kwan Johnny ; 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. / Evidence of Spin Frustration in a Vanadium Diselenide Monolayer Magnet. In: Advanced materials. 2019 ; Vol. 31, No. 23.
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title = "Evidence of Spin Frustration in a Vanadium Diselenide Monolayer Magnet",
abstract = "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.",
keywords = "UT-Hybrid-D, monolayer magnet, spin frustration, van der Waals epitaxy, vanadium diselenide, 2D materials",
author = "Wong, {Ping Kwan Johnny} and Wen Zhang and Fabio Bussolotti and Xinmao Yin and Herng, {Tun Seng} and Lei Zhang and Huang, {Yu Li} and Giovanni Vinai and Sridevi Krishnamurthi and Bukhvalov, {Danil W.} and Zheng, {Yu Jie} and Rebekah Chua and N'Diaye, {Alpha T.} and Morton, {Simon A.} and Yang, {Chao Yao} and {Ou Yang}, {Kui Hon} and Piero Torelli and Wei Chen and Goh, {Kuan Eng Johnson} and Jun Ding and Lin, {Minn Tsong} and Geert Brocks and {de Jong}, {Michel P.} and {Castro Neto}, {Antonio H.} and Wee, {Andrew Thye Shen}",
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Wong, PKJ, Zhang, W, Bussolotti, F, Yin, X, Herng, TS, Zhang, L, Huang, YL, Vinai, G, Krishnamurthi, S, Bukhvalov, DW, Zheng, YJ, Chua, R, N'Diaye, AT, Morton, SA, Yang, CY, Ou Yang, KH, Torelli, P, Chen, W, Goh, KEJ, Ding, J, Lin, MT, Brocks, G, de Jong, MP, Castro Neto, AH & Wee, ATS 2019, 'Evidence of Spin Frustration in a Vanadium Diselenide Monolayer Magnet' Advanced materials, vol. 31, no. 23, 1901185. https://doi.org/10.1002/adma.201901185

Evidence of Spin Frustration in a Vanadium Diselenide Monolayer Magnet. / Wong, Ping Kwan Johnny; 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.

In: Advanced materials, Vol. 31, No. 23, 1901185, 06.06.2019.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Evidence of Spin Frustration in a Vanadium Diselenide Monolayer Magnet

AU - Wong, Ping Kwan Johnny

AU - Zhang, Wen

AU - Bussolotti, Fabio

AU - Yin, Xinmao

AU - Herng, Tun Seng

AU - Zhang, Lei

AU - Huang, Yu Li

AU - Vinai, Giovanni

AU - Krishnamurthi, Sridevi

AU - Bukhvalov, Danil W.

AU - Zheng, Yu Jie

AU - Chua, Rebekah

AU - N'Diaye, Alpha T.

AU - Morton, Simon A.

AU - Yang, Chao Yao

AU - Ou Yang, Kui Hon

AU - Torelli, Piero

AU - Chen, Wei

AU - Goh, Kuan Eng Johnson

AU - Ding, Jun

AU - Lin, Minn Tsong

AU - Brocks, Geert

AU - de Jong, Michel P.

AU - Castro Neto, Antonio H.

AU - Wee, Andrew Thye Shen

N1 - Wiley deal

PY - 2019/6/6

Y1 - 2019/6/6

N2 - 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.

AB - 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.

KW - UT-Hybrid-D

KW - monolayer magnet

KW - spin frustration

KW - van der Waals epitaxy

KW - vanadium diselenide

KW - 2D materials

U2 - 10.1002/adma.201901185

DO - 10.1002/adma.201901185

M3 - Article

VL - 31

JO - Advanced materials

JF - Advanced materials

SN - 0935-9648

IS - 23

M1 - 1901185

ER -

Wong PKJ, Zhang W, Bussolotti F, Yin X, Herng TS, Zhang L et al. Evidence of Spin Frustration in a Vanadium Diselenide Monolayer Magnet. Advanced materials. 2019 Jun 6;31(23). 1901185. https://doi.org/10.1002/adma.201901185