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Title: The role of collective motion in the ultrafast charge transfer in van der Waals heterostructures

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms11504· OSTI ID:1253239
 [1];  [2];  [1];  [1];  [1];  [1];  [3]
  1. Rensselaer Polytechnic Institute, Troy, NY (United States)
  2. Korea Basic Science Institute (KBSI), Daejeon (Korea)
  3. Rensselaer Polytechnic Institute, Troy, NY (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Here, the success of van der Waals (vdW) heterostructures, made of graphene, metal dichalcogenides, and other layered materials, hinges on the understanding of charge transfer across the interface as the foundation for new device concepts and applications. In contrast to conventional heterostructures, where a strong interfacial coupling is essential to charge transfer, recent experimental findings indicate that vdW heterostructues can exhibit ultra-fast charge transfer despite the weak binding of the heterostructure. Using time-dependent density functional theory molecular dynamics, we identify a strong dynamic coupling between the vdW layers associated with charge transfer. This dynamic coupling results in rapid nonlinear coherent charge oscillations which constitute a purely electronic phenomenon and are shown to be a general feature of vdW heterostructures provided they have a critical minimum dipole coupling. Application to MoS2/WS2 heterostructure yields good agreement with experiment, indicating near complete charge transfer within a timescale of 100 fs.The success of van der Waals heterostructures made of graphene, metal dichalcogenides and other layered materials, hinges on the understanding of charge transfer across the interface as the foundation for new device concepts and applications. In contrast to conventional heterostructures, where a strong interfacial coupling is essential to charge transfer, recent experimental findings indicate that van der Waals heterostructues can exhibit ultrafast charge transfer despite the weak binding of these heterostructures. Here we find, using time-dependent density functional theory molecular dynamics, that the collective motion of excitons at the interface leads to plasma oscillations associated with optical excitation. By constructing a simple model of the van der Waals heterostructure, we show that there exists an unexpected criticality of the oscillations, yielding rapid charge transfer across the interface. Application to the MoS2/WS2 heterostructure yields good agreement with experiments, indicating near complete charge transfer within a timescale of 100 fs.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1253239
Journal Information:
Nature Communications, Vol. 7; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 90 works
Citation information provided by
Web of Science

References (56)

Molecular Mechanisms of Photosynthesis book December 2002
Heterogeneous photocatalyst materials for water splitting journal January 2009
Nobel Lecture: The double heterostructure concept and its applications in physics, electronics, and technology journal October 2001
25th Anniversary Article: Bulk Heterojunction Solar Cells: Understanding the Mechanism of Operation journal December 2013
The early history of the high electron mobility transistor (HEMT) journal March 2002
Role of the Charge Transfer State in Organic Donor-Acceptor Solar Cells journal August 2010
Energy and charge transfer in organic light-emitting diodes: A soluble quinacridone study journal June 1999
Van der Waals heterostructures journal July 2013
Electronic properties of the MoS 2 -WS 2 heterojunction journal February 2013
Two-dimensional heterostructures: fabrication, characterization, and application journal January 2014
Vertical 2D Heterostructures journal July 2015
Thermal properties of graphene: Fundamentals and applications journal November 2012
Chiral tunnelling and the Klein paradox in graphene journal August 2006
Valley filter and valley valve in graphene journal February 2007
Valley-selective optical Stark effect in monolayer WS2 journal December 2014
Valley-selective circular dichroism of monolayer molybdenum disulphide journal January 2012
Extraordinary Sunlight Absorption and One Nanometer Thick Photovoltaics Using Two-Dimensional Monolayer Materials journal July 2013
Emerging Photoluminescence in Monolayer MoS2 journal April 2010
Extraordinary Room-Temperature Photoluminescence in Triangular WS 2 Monolayers journal December 2012
Ultrafast charge transfer in atomically thin MoS2/WS2 heterostructures journal August 2014
Vertical and in-plane heterostructures from WS2/MoS2 monolayers journal September 2014
Ultrafast Charge Separation and Indirect Exciton Formation in a MoS 2 –MoSe 2 van der Waals Heterostructure journal November 2014
Atomically thin p–n junctions with van der Waals heterointerfaces journal August 2014
Equally Efficient Interlayer Exciton Relaxation and Improved Absorption in Epitaxial and Nonepitaxial MoS 2 /WS 2 Heterostructures journal December 2014
Electron transfer reactions in chemistry. Theory and experiment journal July 1993
Photoinduced energy and electron transfer in oligo(p-phenylene vinylene)-fullerene dyads journal June 2004
Photoinduced electron transfer in supramolecular systems for artificial photosynthesis journal May 1992
Tailoring the Electronic Structure in Bilayer Molybdenum Disulfide via Interlayer Twist journal June 2014
Stacking effects on the electronic and optical properties of bilayer transition metal dichalcogenides MoS 2 , MoSe 2 , WS 2 , and WSe 2 journal February 2014
Electronic structures and optical properties of realistic transition metal dichalcogenide heterostructures from first principles journal August 2013
Identification of individual and few layers of WS2 using Raman Spectroscopy journal April 2013
Anomalous Lattice Vibrations of Single- and Few-Layer MoS 2 journal March 2010
Coherent ultrafast charge transfer in an organic photovoltaic blend journal May 2014
Quantum coherence controls the charge separation in a prototypical artificial light-harvesting system journal March 2013
Density-Functional Theory for Time-Dependent Systems journal March 1984
The SIESTA method for ab initio order- N materials simulation journal March 2002
Real-time, local basis-set implementation of time-dependent density functional theory for excited state dynamics simulations journal August 2008
Density-functional approach to electron dynamics: Stable simulation under a self-consistent field journal January 1999
Ground State of the Electron Gas by a Stochastic Method journal August 1980
Interlayer Breathing and Shear Modes in Few-Trilayer MoS 2 and WSe 2 journal February 2013
Twisted MoSe 2 Bilayers with Variable Local Stacking and Interlayer Coupling Revealed by Low-Frequency Raman Spectroscopy journal January 2016
Low-Frequency Interlayer Raman Modes to Probe Interface of Twisted Bilayer MoS 2 journal January 2016
Low-Frequency Raman Fingerprints of Two-Dimensional Metal Dichalcogenide Layer Stacking Configurations journal May 2015
States, Effects, and Operations Fundamental Notions of Quantum Theory book January 1983
First-principles Raman spectra of MoS2, WS2 and their heterostructures journal January 2014
Preparation and Crystallinity of Molybdenum and Tungsten Sulfides journal April 1964
Coherent ultrafast charge transfer in an organic photovoltaic blend conference January 2014
States, effects and operations. Fundamental notions of quantum theory journal October 1986
Electron transfer reactions in chemistry theory and experiment journal November 1997
Quantum coherence controls the charge separation in a prototypical artificial light harvesting system conference May 2013
Anomalous Lattice Vibrations of Single and Few-Layer MoS2 text January 2010
Electronic structures and optical properties of realistic transition metal dichalcogenide heterostructures from first principles text January 2013
Valley-selective optical Stark effect in monolayer WS2 text January 2014
Chiral tunneling and the Klein paradox in graphene text January 2006
Valley filter and valley valve in graphene text January 2006
Van der Waals heterostructures text January 2013

Cited By (17)

2D Layered Material-Based van der Waals Heterostructures for Optoelectronics journal January 2018
Transient SHG Imaging on Ultrafast Carrier Dynamics of MoS 2 Nanosheets journal February 2018
Emergent Pseudocapacitance of 2D Nanomaterials journal February 2018
Ultrafast dynamics in van der Waals heterostructures journal November 2018
Interlayer charge transport controlled by exciton–trion coherent coupling journal April 2019
Diabatic Hamiltonian construction in van der Waals heterostructure complexes journal January 2019
Electron redistribution and energy transfer in graphene/MoS 2 heterostructure journal March 2019
Nonlinear optical effect of interlayer charge transfer in a van der Waals heterostructure journal December 2019
Optical control of the layer degree of freedom through Wannier–Stark states in polar 3R MoS 2 journal May 2019
2D materials advances: from large scale synthesis and controlled heterostructures to improved characterization techniques, defects and applications journal December 2016
Vertical heterostructures based on SnSe 2 /MoS 2 for high performance photodetectors journal March 2017
Ultrafast electron transfer dynamics in lateral transition-metal dichalcogenide heterostructures journal September 2019
Layer degree of freedom for excitons in transition metal dichalcogenides journal April 2019
Dynamics of optical excitations in a Fe/MgO(001) heterostructure from time-dependent density functional theory journal May 2019
Inter-layer charge transport controlled by exciton-trion coherent coupling text January 2019
Diabatic Hamiltonian Construction in van der Waals heterostructure complexes preprint January 2019
Interlayer-State-Coupling Dependent Ultrafast Charge Transfer in MoS 2 /WS 2 Bilayers journal April 2017