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Title: Substrate interactions with suspended and supported monolayer MoS2: Angle-resolved photoemission spectroscopy

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics

We report the directly measured electronic structure of exfoliated monolayer molybdenum disulfide (MoS₂) using micrometer-scale angle-resolved photoemission spectroscopy. Measurements of both suspended and supported monolayer MoS₂ elucidate the effects of interaction with a substrate. Thus, a suggested relaxation of the in-plane lattice constant is found for both suspended and supported monolayer MoS₂ crystals. For suspended MoS₂, a careful investigation of the measured uppermost valence band gives an effective mass at Γ¯ and Κ¯ of 2.00m₀ and 0.43m₀, respectively. We also measure an increase in the band linewidth from the midpoint of Γ¯Κ¯ to the vicinity of Κ¯ and briefly discuss its possible origin.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Energy Frontier Research Centers (EFRC) (United States). Re-Defining Photovoltaic Efficiency Through Molecule Scale Control (RPEMSC)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704; SC0001085; FG 02-04-ER-46157; AC02-98CH10886
OSTI ID:
1182523
Alternate ID(s):
OSTI ID: 1180547
Report Number(s):
BNL-107531-2015-JA; PRBMDO; R&D Project: 16083/16083; KC0403020
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Vol. 91, Issue 12; ISSN 1098-0121
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 51 works
Citation information provided by
Web of Science

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Cited By (9)

Imaging microscopic electronic contrasts at the interface of single-layer WS$_2$ with oxide and boron nitride substrates text January 2019
A Perspective on the Application of Spatially Resolved ARPES for 2D Materials journal April 2018
Roadmap on finding chiral valleys: screening 2D materials for valleytronics journal June 2018
Imaging microscopic electronic contrasts at the interface of single-layer WS 2 with oxide and boron nitride substrates journal April 2019
Revealing exciton masses and dielectric properties of monolayer semiconductors with high magnetic fields journal September 2019
Engineering Substrate Interactions for High Luminescence Efficiency of Transition-Metal Dichalcogenide Monolayers journal May 2016
Substrate induced changes in atomically thin 2-dimensional semiconductors: Fundamentals, engineering, and applications journal March 2017
Giant photoluminescence enhancement in tungsten-diselenide–gold plasmonic hybrid structures journal May 2016
Direct determination of monolayer MoS 2 and WSe 2 exciton binding energies on insulating and metallic substrates journal January 2018

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