Journal ArticleDOI
Tuning Interlayer Coupling in Large-Area Heterostructures with CVD-Grown MoS2 and WS2 Monolayers
Sefaattin Tongay,Wen Fan,Wen Fan,Jun Kang,Joonsuk Park,Unsal Koldemir,Joonki Suh,Deepa S. Narang,Kai Liu,Jie Ji,Jingbo Li,Robert Sinclair,Junqiao Wu,Junqiao Wu,Junqiao Wu +14 more
TLDR
This work demonstrates large-area (>tens of micrometers) heterostructures of CVD-grown WS2 and MoS2 monolayers, where the interlayer interaction is externally tuned from noncoupling to strong coupling, which opens up venues to creating new material systems with rich functionalities and novel physical effects.Abstract:
Band offsets between different monolayer transition metal dichalcogenides are expected to efficiently separate charge carriers or rectify charge flow, offering a mechanism for designing atomically thin devices and probing exotic two-dimensional physics. However, developing such large-area heterostructures has been hampered by challenges in synthesis of monolayers and effectively coupling neighboring layers. Here, we demonstrate large-area (>tens of micrometers) heterostructures of CVD-grown WS2 and MoS2 monolayers, where the interlayer interaction is externally tuned from noncoupling to strong coupling. Following this trend, the luminescence spectrum of the heterostructures evolves from an additive line profile where each layer contributes independently to a new profile that is dictated by charge transfer and band normalization between the WS2 and MoS2 layers. These results and findings open up venues to creating new material systems with rich functionalities and novel physical effects.read more
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2D materials and van der Waals heterostructures
TL;DR: Two-dimensional heterostructures with extended range of functionalities yields a range of possible applications, and spectrum reconstruction in graphene interacting with hBN allowed several groups to study the Hofstadter butterfly effect and topological currents in such a system.
Journal ArticleDOI
Recent Advances in Two-Dimensional Materials beyond Graphene
Ganesh R. Bhimanapati,Zhong Lin,Vincent Meunier,Vincent Meunier,Yeonwoong Jung,Jangho J Cha,Saptarshi Das,Di Xiao,Young-Woo Son,Michael S. Strano,Valentino R. Cooper,Liangbo Liang,Liangbo Liang,Steven G. Louie,Steven G. Louie,Emilie Ringe,Wenchao Zhou,Steve S. Kim,Rajesh R. Naik,Bobby G. Sumpter,Humberto Terrones,Humberto Terrones,Fengnian Xia,Yeliang Wang,Jian Zhu,Deji Akinwande,Nasim Alem,Jon A. Schuller,Raymond E. Schaak,Mauricio Terrones,Joshua A. Robinson +30 more
TL;DR: Insight is provided into the theoretical modeling and understanding of the van der Waals forces that hold together the 2D layers in bulk solids, as well as their excitonic properties and growth morphologies.
Journal ArticleDOI
Valleytronics in 2D materials
John Schaibley,Hongyi Yu,Genevieve Clark,Pasqual Rivera,Jason Ross,Kyle L. Seyler,Wang Yao,Xiaodong Xu +7 more
TL;DR: In this article, the latest advances in valley-tronics have largely been enabled by the isolation of 2D materials (such as graphene and semiconducting transition metal dichalcogenides) that host an easily accessible electronic valley degree of freedom, allowing for dynamic control.
Journal ArticleDOI
Phonon and Raman scattering of two-dimensional transition metal dichalcogenides from monolayer, multilayer to bulk material
TL;DR: In this article, the basic lattice vibrations of 2D transition metal dichalcogenide (TMD) nanosheets are discussed, including highfrequency optical phonons, interlayer shear and layer breathing phonons.
Journal ArticleDOI
Defect engineering of two-dimensional transition metal dichalcogenides
Zhong Lin,Bruno R. Carvalho,Bruno R. Carvalho,Ethan Kahn,Ruitao Lv,Rahul Rao,Humberto Terrones,Marcos A. Pimenta,Mauricio Terrones +8 more
TL;DR: In this article, structural defects in two-dimensional transition metal dichalcogenides (TMDs) have been studied and the authors provide a comprehensive understanding of structural defects and the pathways to generating structural defects during and after synthesis.
References
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