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Title: Charge density wave order in 1D mirror twin boundaries of single-layer MoSe2

Journal Article · · Nature Physics
DOI:https://doi.org/10.1038/nphys3730· OSTI ID:1379553
 [1];  [1];  [1]; ORCiD logo [2];  [3];  [4];  [3];  [5]; ORCiD logo [3];  [1];  [6];  [7];  [7];  [1];  [8];  [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry, Materials Division
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source; Nanjing Univ. (China). Collaborative Innovation Center of Advanced Microstructures
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
  4. Univ. of California, Berkeley, CA (United States). Dept. of Physics; CIC nanoGUNE, Donostia-San Sebastian (Spain); Ikerbasque, Bilbao (Spain). Basque Foundation for Science
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  6. Univ. of California, Berkeley, CA (United States). Dept. of Physics, Dept. of Materials Science and Engineering
  7. 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
  8. 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

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.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231; AC02-76SF00515
OSTI ID:
1379553
Journal Information:
Nature Physics, Vol. 12, Issue 8; ISSN 1745-2473
Publisher:
Nature Publishing Group (NPG)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 156 works
Citation information provided by
Web of Science

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Recent Developments in Controlled Vapor‐Phase Growth of 2D Group 6 Transition Metal Dichalcogenides journal December 2018
Tunable Moiré Superlattice of Artificially Twisted Monolayers journal July 2019
Atomic-Scale Structural Modification of 2D Materials journal January 2019
Engineering the Electronic Properties of Two-Dimensional Transition Metal Dichalcogenides by Introducing Mirror Twin Boundaries journal April 2017
A Shallow Acceptor of Phosphorous Doped in MoSe 2 Monolayer journal November 2019
Constructing 1D/2D heterojunction photocatalyst from FeSe 2 nanorods and MoSe 2 nanoplates with high photocatalytic and photoelectrochemical performance journal November 2019
Precisely Aligned Monolayer MoS 2 Epitaxially Grown on h-BN basal Plane journal December 2016
Charge Density Waves Driven by Peierls Instability at the Interface of Two‐Dimensional Lateral Heterostructures journal October 2018
Electronic Doping Controlled Migration of Dislocations in Polycrystalline 2D WS 2 journal April 2019
Atomically Sharp Dual Grain Boundaries in 2D WS 2 Bilayers journal August 2019
2D transition metal dichalcogenides journal June 2017
Oscillating edge states in one-dimensional MoS2 nanowires journal October 2016
Angle resolved photoemission spectroscopy reveals spin charge separation in metallic MoSe2 grain boundary journal February 2017
Correlated electronic states at domain walls of a Mott-charge-density-wave insulator 1T-TaS2 journal August 2017
In situ edge engineering in two-dimensional transition metal dichalcogenides journal May 2018
Selective self-assembly of 2,3-diaminophenazine molecules on MoSe2 mirror twin boundaries journal June 2019
Identifying substitutional oxygen as a prolific point defect in monolayer transition metal dichalcogenides journal July 2019
Possible Luttinger liquid behavior of edge transport in monolayer transition metal dichalcogenide crystals journal January 2020
Strain-driven growth of ultra-long two-dimensional nano-channels journal February 2020
Visualizing electronic structures of quantum materials by angle-resolved photoemission spectroscopy journal August 2018
Growth and Thermo-driven Crystalline Phase Transition of Metastable Monolayer 1T′-WSe2 Thin Film journal February 2019
Nitrogen doping for facile and effective modification of graphene surfaces journal January 2017
Electronic and magnetic properties of the one-dimensional interfaces of two-dimensional lateral GeC/BP heterostructures journal January 2019
Spin-resolved photoemission study of epitaxially grown MoSe 2 and WSe 2 thin films journal September 2016
Mirror twin grain boundaries in molybdenum dichalcogenides journal November 2018
Large-area synthesis and photoelectric properties of few-layer MoSe 2 on molybdenum foils journal February 2018
Charging effect at grain boundaries of MoS 2 journal March 2018
Forces and electronic transport in a contact formed by a graphene tip and a defective MoS 2 monolayer: a theoretical study journal April 2018
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Molecular beam epitaxy of quasi-freestanding transition metal disulphide monolayers on van der Waals substrates: a growth study journal January 2018
Electrical transport across grain boundaries in graphene monolayers on SiC(0 0 0 $\bar{1}$ ) journal April 2018
Band-bending induced by charged defects and edges of atomically thin transition metal dichalcogenide films journal June 2018
Multimodal spectromicroscopy of monolayer WS 2 enabled by ultra-clean van der Waals epitaxy journal July 2018
Disentangling the effects of doping, strain and disorder in monolayer WS 2 by optical spectroscopy journal January 2020
Band structure and giant Stark effect in two-dimensional transition-metal dichalcogenides journal November 2018
Strain in van der Waals epitaxy and evidence for a collective macroscopic effect of a negligibly small perturbation journal July 2019
Predictive design of intrinsic half-metallicity in zigzag tungsten dichalcogenide nanoribbons journal November 2019
High-resolution imaging of silicene on an Ag(111) surface by atomic force microscopy journal December 2017
Room temperature in-plane ferroelectricity in van der Waals In 2 Se 3 journal July 2018
Ultrafast manipulation of mirror domain walls in a charge density wave journal October 2018
Atomically thin three-dimensional membranes of van der Waals semiconductors by wafer-scale growth journal July 2019
A Scanning Tunneling Microscopy Study of Monolayer and Bilayer Transition-Metal Dichalcogenides Grown by Molecular-Beam Epitaxy journal December 2018
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Correlated electronic states at domain walls of a Mott-charge-density-wave insulator 1T-TaS2 text January 2017
Band structure and giant Stark effect in two-dimensional transition-metal dichalcogenides preprint January 2017
Disentangling the effects of doping, strain and defects in monolayer WS2 by optical spectroscopy text January 2019