First principles study on 2H–1T' transition in MoS2 with copper
Abstract
In this paper, the electronic properties of MoS2 are strongly controlled by the structure, providing a route to their modulation. We report, based on first principles calculations, that the adsorption of metal atom Cu on the surface can induce the phase transition of MoS2 from the semiconducting 2H to the metallic 1T' phase. Cu adsorption results in effective n-type doping of MoS2 by charge transfer from Cu in the case of the 1T' phase. This is distinct from the behavior in the 2H phase, where Cu does not donate any charge, and it is also distinct from alkali metal adsorption, where charge is donated to both 2H and 1T' MoS2. Charge donation to the 1T' phase by Cu stabilizes it with respect to the 2H structure and importantly, it also reduces the energy barrier between the 2H and 1T' structures. This difference reflects the higher electronegativity of Cu, which also indicates that Cu-modified MoS2 can be expected to be less chemically reactive than MoS2 with alkali metal adatoms. The main atomic mechanism of the structural transition is the gliding of S atoms on the upper surface. Finally, we report the energetics of the 2H to 1T' transition with several othermore »
- Authors:
-
[1];
[2];
[1]
- Jilin Univ., Changchun (China)
- Univ. of Missouri, Columbia, MO (United States)
- Publication Date:
- Research Org.:
- Univ. of Missouri, Columbia, MO (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1480052
- Alternate Identifier(s):
- OSTI ID: 1477895
- Grant/Contract Number:
- SC0014607; SC00014607
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Chemistry Chemical Physics. PCCP
- Additional Journal Information:
- Journal Volume: 20; Journal Issue: 42; Journal ID: ISSN 1463-9076
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; phase transformation; first principles calculations; monolayer MoS2; energy barrier
Citation Formats
Huang, H. H., Fan, Xiaofeng, Singh, David J., and Zheng, W. T. First principles study on 2H–1T' transition in MoS2 with copper. United States: N. p., 2018.
Web. doi:10.1039/c8cp05445b.
Huang, H. H., Fan, Xiaofeng, Singh, David J., & Zheng, W. T. First principles study on 2H–1T' transition in MoS2 with copper. United States. https://doi.org/10.1039/c8cp05445b
Huang, H. H., Fan, Xiaofeng, Singh, David J., and Zheng, W. T. Tue .
"First principles study on 2H–1T' transition in MoS2 with copper". United States. https://doi.org/10.1039/c8cp05445b. https://www.osti.gov/servlets/purl/1480052.
@article{osti_1480052,
title = {First principles study on 2H–1T' transition in MoS2 with copper},
author = {Huang, H. H. and Fan, Xiaofeng and Singh, David J. and Zheng, W. T.},
abstractNote = {In this paper, the electronic properties of MoS2 are strongly controlled by the structure, providing a route to their modulation. We report, based on first principles calculations, that the adsorption of metal atom Cu on the surface can induce the phase transition of MoS2 from the semiconducting 2H to the metallic 1T' phase. Cu adsorption results in effective n-type doping of MoS2 by charge transfer from Cu in the case of the 1T' phase. This is distinct from the behavior in the 2H phase, where Cu does not donate any charge, and it is also distinct from alkali metal adsorption, where charge is donated to both 2H and 1T' MoS2. Charge donation to the 1T' phase by Cu stabilizes it with respect to the 2H structure and importantly, it also reduces the energy barrier between the 2H and 1T' structures. This difference reflects the higher electronegativity of Cu, which also indicates that Cu-modified MoS2 can be expected to be less chemically reactive than MoS2 with alkali metal adatoms. The main atomic mechanism of the structural transition is the gliding of S atoms on the upper surface. Finally, we report the energetics of the 2H to 1T' transition with several other adatoms, Ag, Au, Ni, Pt and Pd, but none of them are as effective as Cu in inducing the transition.},
doi = {10.1039/c8cp05445b},
journal = {Physical Chemistry Chemical Physics. PCCP},
number = 42,
volume = 20,
place = {United States},
year = {Tue Oct 02 00:00:00 EDT 2018},
month = {Tue Oct 02 00:00:00 EDT 2018}
}
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