skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Band structure characterization of WS2 grown by chemical vapor deposition

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4954278· OSTI ID:1467573

Growth by chemical vapor deposition (CVD) leads to multilayer WS2 of very high quality, based on high-resolution angle-resolved photoemission spectroscopy. The experimental valence band electronic structure is considered to be in good agreement with that obtained from density functional theory calculations. We find the spin-orbit splitting at the K¯ point to be 420 ± 20 meV with a hole effective mass of –0.35 ± 0.02 me for the upper spin-orbit component (the branch closer to the Fermi level) and –0.43 ± 0.07 me for the lower spin-orbit component. As predicted by theory, a thickness-dependent increase of bandwidth is observed at the top of the valence band, in the region of the Brillouin zone center. In conclusion, the top of the valence band of the CVD-prepared films exhibits a substantial binding energy, consistent with n-type behavior, and in agreement with transistor characteristics acquired using devices incorporating the same WS2 material.

Research Organization:
Univ. of California, Riverside, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FG02-07ER15842
OSTI ID:
1467573
Alternate ID(s):
OSTI ID: 1258326
Journal Information:
Applied Physics Letters, Vol. 108, Issue 25; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 32 works
Citation information provided by
Web of Science

References (54)

Generalized Gradient Approximation Made Simple journal October 1996
Vertical field-effect transistor based on graphene–WS2 heterostructures for flexible and transparent electronics journal December 2012
A tight-binding model for MoS 2 monolayers journal August 2015
Band offsets and heterostructures of two-dimensional semiconductors journal January 2013
Projector augmented-wave method journal December 1994
Angle-resolved photoemission spectroscopy and imaging with a submicrometre probe at the SPECTROMICROSCOPY-3.2L beamline of Elettra journal May 2010
Spin–orbit coupling in the band structure of monolayer WSe 2 journal April 2015
Full-range electrical characteristics of WS 2 transistors journal March 2015
High Mobility WSe 2 p - and n - Type Field-Effect Transistors Contacted by Highly Doped Graphene for Low-Resistance Contacts journal May 2014
Tightly Bound Excitons in Monolayer WSe 2 journal July 2014
Occupied and unoccupied electronic band structure of WSe 2 journal April 1997
Electronic band structure of single-crystal and single-layer WS 2 : Influence of interlayer van der Waals interactions journal November 2001
Facile growth of monolayer MoS2 film areas on SiO2 journal May 2013
Influence of quantum confinement on the electronic structure of the transition metal sulfide T S 2 journal June 2011
Spin resolved photoemission spectroscopy on WSe2 journal June 1999
High-performance photocurrent generation from two-dimensional WS 2 field-effect transistors journal May 2014
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Optoelectronic devices based on electrically tunable p–n diodes in a monolayer dichalcogenide journal March 2014
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
Multi-terminal transport measurements of MoS2 using a van der Waals heterostructure device platform journal April 2015
The Role of Surface Orientation in the Photoelectrochemical Behavior of Layer Type d-Band Semiconductors journal October 1979
Electronic properties of the MoS 2 -WS 2 heterojunction journal February 2013
k · p theory for two-dimensional transition metal dichalcogenide semiconductors journal April 2015
Detailed photocurrent spectroscopy of the semiconducting group VIB transition metal dichalcogenides journal February 1982
Quantitative Determination of the Band Gap of WS 2 with Ambipolar Ionic Liquid-Gated Transistors journal September 2012
Lateral epitaxial growth of two-dimensional layered semiconductor heterojunctions journal September 2014
Transistors with chemically synthesized layered semiconductor WS 2 exhibiting 10 5 room temperature modulation and ambipolar behavior journal July 2012
Electronic structure, spin-orbit coupling, and interlayer interaction in bulk MoS 2 and WS 2 journal June 2015
Symmetry-resolved surface-derived electronic structure of MoS 2 (0 0 0 1) journal October 2014
Giant spin-orbit-induced spin splitting in two-dimensional transition-metal dichalcogenide semiconductors journal October 2011
Transport Properties of Monolayer MoS 2 Grown by Chemical Vapor Deposition journal March 2014
Electronic structure of WSe 2 : A combined photoemission and inverse photoemission study journal April 1997
Ab initiomolecular dynamics for liquid metals journal January 1993
Probing excitonic states in suspended two-dimensional semiconductors by photocurrent spectroscopy journal October 2014
Electronic Structure of Epitaxial Single-Layer MoS 2 journal January 2015
Large excitonic effects in monolayers of molybdenum and tungsten dichalcogenides journal September 2012
Evolution of Electronic Structure in Atomically Thin Sheets of WS 2 and WSe 2 journal December 2012
Measurement of high exciton binding energy in the monolayer transition-metal dichalcogenides WS2 and WSe2 journal February 2015
Direct observation of spin-polarized bulk bands in an inversion-symmetric semiconductor journal October 2014
Single-layer MoS2 transistors journal January 2011
Photocarrier relaxation pathway in two-dimensional semiconducting transition metal dichalcogenides journal July 2014
A consistent and accurate ab initio parametrization of density functional dispersion correction (DFT-D) for the 94 elements H-Pu journal April 2010
Quasiparticle band structures and optical properties of strained monolayer MoS 2 and WS 2 journal April 2013
Quasiparticle band structure calculation of monolayer, bilayer, and bulk MoS 2 journal May 2012
Electronic and thermoelectric properties of few-layer transition metal dichalcogenides journal March 2014
Zeeman-type spin splitting controlled by an electric field journal July 2013
Reducing Dzyaloshinskii-Moriya interaction and field-free spin-orbit torque switching in synthetic antiferromagnets journal May 2021
Tuning layer-hybridized moiré excitons by the quantum-confined Stark effect journal November 2020
Electronic structure of AlFeN films exhibiting crystallographic orientation change from c- to a-axis with Fe concentrations and annealing effect journal February 2020
Twist-tailoring Coulomb correlations in van der Waals homobilayers text January 2020
Transistors with Chemically Synthesized Layered Semiconductor WS2 Exhibiting 105 Room Temperature Modulation and Ambipolar Behavior text January 2012
Evolution of Electronic Structure in Atomically Thin Sheets of WS2 and WSe2 text January 2012
Transport properties of monolayer MoS$_2$ grown by chemical vapour deposition text January 2014
k.p theory for two-dimensional transition metal dichalcogenide semiconductors text January 2014

Cited By (9)

2D transition metal dichalcogenides journal June 2017
Electronic properties of atomically thin MoS 2 layers grown by physical vapour deposition: band structure and energy level alignment at layer/substrate interfaces journal January 2018
Roadmap on finding chiral valleys: screening 2D materials for valleytronics journal June 2018
Lateral interfaces of transition metal dichalcogenides: A stable tunable one-dimensional physics platform journal January 2019
Interaction-Induced Shubnikov–de Haas Oscillations in Optical Conductivity of Monolayer MoSe 2 journal August 2019
Synthesis of Large-Scale Single-Crystalline Monolayer WS2 Using a Semi-Sealed Method journal February 2018
A Perspective on the Application of Spatially Resolved ARPES for 2D Materials journal April 2018
Lateral Interfaces of Transition Metal Dichalcogenides: A Stable Tunable One-Dimensional Physics Platform text January 2018
Nature of Excitons in Bidimensional WSe2 by Hybrid Density Functional Theory Calculations journal June 2018