Van der Waals heterostructures
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TLDR
With steady improvement in fabrication techniques and using graphene’s springboard, van der Waals heterostructures should develop into a large field of their own.Abstract:
Fabrication techniques developed for graphene research allow the disassembly of many layered crystals (so-called van der Waals materials) into individual atomic planes and their reassembly into designer heterostructures, which reveal new properties and phenomena. Andre Geim and Irina Grigorieva offer a forward-looking review of the potential of layering two-dimensional materials into novel heterostructures held together by weak van der Waals interactions. Dozens of these one-atom- or one-molecule-thick crystals are known. Graphene has already been well studied but others, such as monolayers of hexagonal boron nitride, MoS2, WSe2, graphane, fluorographene, mica and silicene are attracting increasing interest. There are many other monolayers yet to be examined of course, and the possibility of combining graphene with other crystals adds even further options, offering exciting new opportunities for scientific exploration and technological innovation. Research on graphene and other two-dimensional atomic crystals is intense and is likely to remain one of the leading topics in condensed matter physics and materials science for many years. Looking beyond this field, isolated atomic planes can also be reassembled into designer heterostructures made layer by layer in a precisely chosen sequence. The first, already remarkably complex, such heterostructures (often referred to as ‘van der Waals’) have recently been fabricated and investigated, revealing unusual properties and new phenomena. Here we review this emerging research area and identify possible future directions. With steady improvement in fabrication techniques and using graphene’s springboard, van der Waals heterostructures should develop into a large field of their own.read more
Citations
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The Future of Memristors: Materials Engineering and Neural Networks
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Atomically thin heterostructures based on single-layer tungsten diselenide and graphene.
Yu-Chuan Lin,Chih Yuan S. Chang,Ram Krishna Ghosh,Jie Li,Hui Zhu,Rafik Addou,Bogdan Diaconescu,Taisuke Ohta,Xin Peng,Ning Lu,Moon J. Kim,Jeremy T. Robinson,Robert M. Wallace,Theresa S. Mayer,Suman Datta,Lain-Jong Li,Joshua A. Robinson +16 more
TL;DR: The direct growth of crystalline, monolayer tungsten diselenide (WSe2) on epitaxial graphene (EG) grown from silicon carbide is reported, providing evidence that an additional barrier to carrier transport beyond the expected WSe2/EG band offset exists due to the interlayer gap.
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Evidence of Spin Frustration in a Vanadium Diselenide Monolayer Magnet.
Ping Kwan Johnny Wong,Wen Zhang,Fabio Bussolotti,Xinmao Yin,Tun Seng Herng,Lei Zhang,Yuli Huang,Giovanni Vinai,Sridevi Krishnamurthi,Danil W. Bukhvalov,Danil W. Bukhvalov,Yujie Zheng,Rebekah Chua,Alpha T. N'Diaye,Simon A. Morton,Chao Yao Yang,Kui Hon Ou Yang,Piero Torelli,Wei Chen,Kuan Eng Johnson Goh,Kuan Eng Johnson Goh,Jun Ding,Minn-Tsong Lin,Geert Brocks,Michel P. de Jong,Antonio H. Castro Neto,Andrew T. S. Wee +26 more
TL;DR: The results of this study extend the current understanding of metallic 2D-TMDs in the search for exotic low-dimensional quantum phenomena, and stimulate further theoretical and experimental studies on van der Waals monolayer magnets.
Journal ArticleDOI
Moiré Phonons in Twisted Bilayer MoS 2
Miao-Ling Lin,Qing-Hai Tan,Jiang-Bin Wu,Xiaoshuang Chen,Jin-Huan Wang,Yuhao Pan,Xin Zhang,Xin Cong,Jun Zhang,Wei Ji,PingAn Hu,Kaihui Liu,Ping-Heng Tan +12 more
TL;DR: This study can be extended to various vdWHs to deeply understand their Raman spectra, moiré phonons, lattice dynamics, excitonic effects, and interlayer coupling.
Journal ArticleDOI
Breakdown of Optical Phonons’ Splitting in Two-Dimensional Materials
TL;DR: Analysis of the long-wavelength dispersion of longitudinal and transverse optical phonon modes in polar two-dimensional materials, multilayers, and their heterostructures shows that at variance with the three-dimensional case these modes are degenerate at the zone center but the macroscopic electric field associated with the longitudinal-optical modes gives rise to a finite slope at the zones center in their corresponding phonon dispersions.
References
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