Metallic 1T Phase, 3d1 Electronic Configuration and Charge Density Wave Order in Molecular Beam Epitaxy Grown Monolayer Vanadium Ditelluride
Abstract
We present a combined experimental and theoretical study of monolayer vanadium ditelluride, VTe2, grown on highly oriented pyrolytic graphite by molecular-beam epitaxy. Using various in situ microscopic and spectroscopic techniques, including scanning tunneling microscopy/spectroscopy, synchrotron X-ray and angle-resolved photoemission, and X-ray absorption, together with theoretical analysis by density functional theory calculations, we demonstrate direct evidence of the metallic 1T phase and 3d1 electronic configuration in monolayer VTe2 that also features a (4 × 4) charge density wave order at low temperatures. In contrast to previous theoretical predictions, our element-specific characterization by X-ray magnetic circular dichroism rules out a ferromagnetic order intrinsic to the monolayer. Our findings provide essential knowledge necessary for understanding this interesting yet less explored metallic monolayer in the emerging family of van der Waals magnets.
- Authors:
-
- National Univ. of Singapore (Singapore)
- Agency for Science, Technology, and Research (A*Star), Innovis, (Singapore)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- National Univ. of Singapore (Singapore); Agency for Science, Technology, and Research (A*Star), Innovis, (Singapore)
- Univ. of Twente, Enschede (Netherlands)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Singapore Ministry of Education
- OSTI Identifier:
- 1619138
- Grant/Contract Number:
- AC02-05CH11231; MOE2016-T2-2-110; R-143-000-652-112; 1527000016
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Nano
- Additional Journal Information:
- Journal Volume: 13; Journal Issue: 11; Journal ID: ISSN 1936-0851
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; two-dimensional materials; transition-metal dichalcogenides; vanadium ditelluride; molecular beam epitaxy; magnetism
Citation Formats
Wong, Ping Kwan Johnny, Zhang, Wen, Zhou, Jun, Bussolotti, Fabio, Yin, Xinmao, Zhang, Lei, N’Diaye, Alpha T., Morton, Simon A., Chen, Wei, Goh, Johnson, de Jong, Michel P., Feng, Yuan Ping, and Wee, Andrew T. S. Metallic 1T Phase, 3d1 Electronic Configuration and Charge Density Wave Order in Molecular Beam Epitaxy Grown Monolayer Vanadium Ditelluride. United States: N. p., 2019.
Web. doi:10.1021/acsnano.9b05349.
Wong, Ping Kwan Johnny, Zhang, Wen, Zhou, Jun, Bussolotti, Fabio, Yin, Xinmao, Zhang, Lei, N’Diaye, Alpha T., Morton, Simon A., Chen, Wei, Goh, Johnson, de Jong, Michel P., Feng, Yuan Ping, & Wee, Andrew T. S. Metallic 1T Phase, 3d1 Electronic Configuration and Charge Density Wave Order in Molecular Beam Epitaxy Grown Monolayer Vanadium Ditelluride. United States. https://doi.org/10.1021/acsnano.9b05349
Wong, Ping Kwan Johnny, Zhang, Wen, Zhou, Jun, Bussolotti, Fabio, Yin, Xinmao, Zhang, Lei, N’Diaye, Alpha T., Morton, Simon A., Chen, Wei, Goh, Johnson, de Jong, Michel P., Feng, Yuan Ping, and Wee, Andrew T. S. Wed .
"Metallic 1T Phase, 3d1 Electronic Configuration and Charge Density Wave Order in Molecular Beam Epitaxy Grown Monolayer Vanadium Ditelluride". United States. https://doi.org/10.1021/acsnano.9b05349. https://www.osti.gov/servlets/purl/1619138.
@article{osti_1619138,
title = {Metallic 1T Phase, 3d1 Electronic Configuration and Charge Density Wave Order in Molecular Beam Epitaxy Grown Monolayer Vanadium Ditelluride},
author = {Wong, Ping Kwan Johnny and Zhang, Wen and Zhou, Jun and Bussolotti, Fabio and Yin, Xinmao and Zhang, Lei and N’Diaye, Alpha T. and Morton, Simon A. and Chen, Wei and Goh, Johnson and de Jong, Michel P. and Feng, Yuan Ping and Wee, Andrew T. S.},
abstractNote = {We present a combined experimental and theoretical study of monolayer vanadium ditelluride, VTe2, grown on highly oriented pyrolytic graphite by molecular-beam epitaxy. Using various in situ microscopic and spectroscopic techniques, including scanning tunneling microscopy/spectroscopy, synchrotron X-ray and angle-resolved photoemission, and X-ray absorption, together with theoretical analysis by density functional theory calculations, we demonstrate direct evidence of the metallic 1T phase and 3d1 electronic configuration in monolayer VTe2 that also features a (4 × 4) charge density wave order at low temperatures. In contrast to previous theoretical predictions, our element-specific characterization by X-ray magnetic circular dichroism rules out a ferromagnetic order intrinsic to the monolayer. Our findings provide essential knowledge necessary for understanding this interesting yet less explored metallic monolayer in the emerging family of van der Waals magnets.},
doi = {10.1021/acsnano.9b05349},
journal = {ACS Nano},
number = 11,
volume = 13,
place = {United States},
year = {Wed Nov 06 00:00:00 EST 2019},
month = {Wed Nov 06 00:00:00 EST 2019}
}
Web of Science
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