Charge density wave order in 1D mirror twin boundaries of single-layer MoSe2
Abstract
Here, We provide direct evidence for the existence of isolated, one-dimensional charge density waves at mirror twin boundaries (MTBs) of single-layer semiconducting MoSe 2. Such MTBs have been previously observed by transmission electron microscopy and have been predicted to be metallic in MoSe 2 and MoS 2. 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.
- Authors:
-
[2];
[3];
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry, Materials Division
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source; Nanjing Univ. (China). Collaborative Innovation Center of Advanced Microstructures
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
- Univ. of California, Berkeley, CA (United States). Dept. of Physics; CIC nanoGUNE, Donostia-San Sebastian (Spain); Ikerbasque, Bilbao (Spain). Basque Foundation for Science
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Univ. of California, Berkeley, CA (United States). Dept. of Physics, Dept. of Materials Science and Engineering
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Division, Kavli Energy NanoSciences Inst.; Univ. of California, Berkeley, CA (United States). Dept. of Physics
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry, Materials Division, Kavli Energy NanoSciences Inst.; Univ. of California, Berkeley, CA (United States). Dept. of Physics
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1379553
- Grant/Contract Number:
- AC02-05CH11231; AC02-76SF00515
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Physics
- Additional Journal Information:
- Journal Volume: 12; Journal Issue: 8; Journal ID: ISSN 1745-2473
- Publisher:
- Nature Publishing Group (NPG)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; two-dimensional materials
Citation Formats
Barja, Sara, Wickenburg, Sebastian, Liu, Zhen-Fei, Zhang, Yi, Ryu, Hyejin, Ugeda, Miguel M., Hussain, Zahid, Shen, Zhi-Xun, Mo, Sung-Kwan, Wong, Ed, Salmeron, Miquel B., Wang, Feng, Crommie, Michael F., Ogletree, D. Frank, Neaton, Jeffrey B., and Weber-Bargioni, Alexander. Charge density wave order in 1D mirror twin boundaries of single-layer MoSe2. United States: N. p., 2016.
Web. doi:10.1038/nphys3730.
Barja, Sara, Wickenburg, Sebastian, Liu, Zhen-Fei, Zhang, Yi, Ryu, Hyejin, Ugeda, Miguel M., Hussain, Zahid, Shen, Zhi-Xun, Mo, Sung-Kwan, Wong, Ed, Salmeron, Miquel B., Wang, Feng, Crommie, Michael F., Ogletree, D. Frank, Neaton, Jeffrey B., & Weber-Bargioni, Alexander. Charge density wave order in 1D mirror twin boundaries of single-layer MoSe2. United States. https://doi.org/10.1038/nphys3730
Barja, Sara, Wickenburg, Sebastian, Liu, Zhen-Fei, Zhang, Yi, Ryu, Hyejin, Ugeda, Miguel M., Hussain, Zahid, Shen, Zhi-Xun, Mo, Sung-Kwan, Wong, Ed, Salmeron, Miquel B., Wang, Feng, Crommie, Michael F., Ogletree, D. Frank, Neaton, Jeffrey B., and Weber-Bargioni, Alexander. Mon .
"Charge density wave order in 1D mirror twin boundaries of single-layer MoSe2". United States. https://doi.org/10.1038/nphys3730. https://www.osti.gov/servlets/purl/1379553.
@article{osti_1379553,
title = {Charge density wave order in 1D mirror twin boundaries of single-layer MoSe2},
author = {Barja, Sara and Wickenburg, Sebastian and Liu, Zhen-Fei and Zhang, Yi and Ryu, Hyejin and Ugeda, Miguel M. and Hussain, Zahid and Shen, Zhi-Xun and Mo, Sung-Kwan and Wong, Ed and Salmeron, Miquel B. and Wang, Feng and Crommie, Michael F. and Ogletree, D. Frank and Neaton, Jeffrey B. and Weber-Bargioni, Alexander},
abstractNote = {Here, We provide direct evidence for the existence of isolated, one-dimensional charge density waves at mirror twin boundaries (MTBs) of single-layer semiconducting MoSe 2. Such MTBs have been previously observed by transmission electron microscopy and have been predicted to be metallic in MoSe 2 and MoS 2. 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.},
doi = {10.1038/nphys3730},
journal = {Nature Physics},
number = 8,
volume = 12,
place = {United States},
year = {Mon Apr 18 00:00:00 EDT 2016},
month = {Mon Apr 18 00:00:00 EDT 2016}
}
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