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Charge density wave order in 1D mirror twin boundaries of single-layer MoSe2
Open accessAbstract
A scanning tunnelling microscopy study demonstrates that one-dimensional charge density waves can form at twin boundaries in a monolayer transition metal dichalcogenide. We provide direct evidence for the existence of isolated, one-dimensional charge density waves at mirror twin boundaries (MTBs) of single-layer semiconducting MoSe2. Such MTBs have been previously observed by transmission electron microscopy and have been predicted to be metallic in MoSe2 and MoS21,2,3,4,5,6,7. Our low-temperature scanning tunnelling microscopy/spectroscopy measurements revealed a substantial bandgap of 100 meV opening at the Fermi energy in the otherwise metallic one-dimensional structures. We found a periodic modulation in the density of states along the MTB, with a wavelength of approximately three lattice constants. In addition to mapping the energy-dependent density of states, we determined the atomic structure and bonding of the MTB through simultaneous high-resolution non-contact atomic force microscopy. Density functional theory calculations based on the observed structure reproduced both the gap opening and the spatially resolved density of states.
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Cites
Identification of Active Edge Sites for Electrochemical H 2 Evolution from MoS 2 Nanocatalysts
Jaramillo, T. F., Jørgensen, K. P., Bonde, J., Nielsen, J. H., Horch, S., & Chorkendorff, I. (2007) · Science · doi:10.1126/science.1141483 · Cited by 6,100
Metadata
- Authors
- Barja, S., Wickenburg, S., Liu, Z.-F., Zhang, Y., Ryu, H., Ugeda, M. M., Hussain, Z., Shen, Z.-X., Mo, S.-K., Wong, E., Salmeron, M. B., Wang, F., Crommie, M. F., Ogletree, D. F., Neaton, J. B., & Weber-Bargioni, A.
- Venue
- Nature Physics
- Published
- 2016-04-18
- Volume
- 12
- Issue
- 8
- Pages
- 751-756
- ISSN
- 1745-2473 (ISSN-L)
- 1745-2481
- OpenAlex
- W2339168429
- Cited by
- 265
- References
- 1
- FWCI
- 13.53
- Type
- journal article
- Language
- en
- Open access
- green
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- Barja, S., Wickenburg, S., Liu, Z.-F., Zhang, Y., Ryu, H., Ugeda, M. M., Hussain, Z., Shen, Z.-X., Mo, S.-K., Wong, E., Salmeron, M. B., Wang, F., Crommie, M. F., Ogletree, D. F., Neaton, J. B., & Weber-Bargioni, A. (2016). Charge density wave order in 1D mirror twin boundaries of single-layer MoSe2. Nature Physics. https://doi.org/10.1038/nphys3730
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