Results 81 to 90 of about 5,255,189 (272)

Resolving the Structural Duality of Graphene Grain Boundaries

Advanced Materials, EarlyView.
Cantilever ncAFM resolves the atomic structure of grain boundaries in graphene, revealing coexisting stable and metastable types. Both contain pentagon/heptagon defects, but metastable GBs show irregular geometries. Modeling shows metastable GBs form under compression, exhibiting vertical corrugation, while stable GBs are flat.
Haojie Guo, Emiliano Ventura‐Macías, Mariano D. Jiménez‐Sánchez, Nicoleta Nicoara, Pierre Mallet, Jean‐Yves Veuillen, Vincent T. Renard, Antonio J. Martínez‐Galera, Pablo Pou, Julio Gómez‐Herrero, Rubén Pérez, Iván Brihuega   +11 more
wiley   +1 more source

Multibranch Wavelet-Based Network for Image Demoiréing

Sensors
Moiré patterns caused by aliasing between the camera’s sensor and the monitor can severely degrade image quality. Image demoiréing is a multi-task image restoration method that includes texture and color restoration. This paper proposes a new multibranch
Chia-Hung Yeh, Chen Lo, Cheng-Han He
doaj   +1 more source

A comprehensive analysis of the (R13xR13)R13.9{\deg} type II structure of silicene on Ag(111)

, 2016
In this paper, using the same geometrical approach than for the (2R3x2R3) R30{\deg} structure (H. Jamgotchian et al., 2015, Journal of Physics. Condensed Matter 27 395002), for the (R13xR13)R13.9{\deg} type II structure, we propose an atomic model of the
Aufray, B., Biberian, J. -P., Ealet, B., Hoarau, J. -Y., Jamgotchian, H., Maradj, H.   +5 more
core   +3 more sources

Observation of moiré excitons in WSe2/WS2 heterostructure superlattices [PDF]

Nature, 2018
Moiré superlattices enable the generation of new quantum phenomena in two-dimensional heterostructures, in which the interactions between the atomically thin layers qualitatively change the electronic band structure of the superlattice. For example, mini-
Chenhao Jin, Emma C. Regan, A. Yan, M. Iqbal Bakti Utama, Danqing Wang, Sihan Zhao, Ying Qin, Si-jie Yang, Zhiren Zheng, Shenyang Shi, Kenji Watanabe, T. Taniguchi, S. Tongay, A. Zettl, Feng Wang   +14 more
semanticscholar   +1 more source

Resonant Interlayer Coupling in NbSe2‐Graphite Epitaxial Moiré Superlattices

Advanced Materials, EarlyView.
Combining angle‐resolved photoemission spectroscopy and density functional theory derived calculations, this work reveals strong interlayer coupling and moiré replicas of the graphite π states in molecular‐beam epitaxy grown van der Waals heterostructures of monolayer‐NbSe2/graphite, with implications for its collective phases that form. Abstract Moiré
Shu Mo, Ksenija Kovalenka, Sebastian Buchberger, Bruno K. Saika, Anugrah Azhar, Akhil Rajan, Andela Zivanovic, Yu‐Chi Yao, Rodion V. Belosludov, Matthew D. Watson, M Saeed Bahramy, Phil D.C. King   +11 more
wiley   +1 more source

Reversible Graphene decoupling by NaCl photo-dissociation

, 2019
We describe the reversible intercalation of Na under graphene on Ir(111) by photo-dissociation of a previously adsorbed NaCl overlayer. After room temperature evaporation, NaCl adsorbs on top of graphene forming a bilayer.
Aballe, L., de Oteyza, D. G., Foerster, M., García-Hernández, M., Martín-Gago, J. A., Palacio, I.   +5 more
core   +1 more source

Bulk valley transport and Berry curvature spreading at the edge of flat bands

, 2020
2D materials based superlattices have emerged as a promising platform to modulate band structure and its symmetries. In particular, moir\'e periodicity in twisted graphene systems produces flat Chern bands. The recent observation of anomalous Hall effect
Adak, Pratap Chandra, Chittari, Bheema Lingam, Deshmukh, Mandar M., Jung, Jeil, Kanthi, R. S. Surya, Sangani, L. D. Varma, Sinha, Subhajit, Taniguchi, Takashi, Watanabe, Kenji   +8 more
core   +1 more source

Moiré bands in twisted double-layer graphene [PDF]

Proceedings of the National Academy of Sciences of the United States of America, 2010
A moiré pattern is formed when two copies of a periodic pattern are overlaid with a relative twist. We address the electronic structure of a twisted two-layer graphene system, showing that in its continuum Dirac model the moiré pattern periodicity leads ...
R. Bistritzer, A. Macdonald
semanticscholar   +1 more source

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

Moiré collective vibrations in atomically thin van der Waals superlattices

Nature Communications
Collective vibration is pivotal for materials’ thermal, electrical, phase transition and topological properties. Lately, the rising of moiré superlattices, characterized by overarching periodicity of moiré pattern, generates highly tunable interfacial ...
Lijia Li, Jiajun Chen, Laigui Hu, Zhijun Qiu, Zhuo Zou, Ran Liu, Lirong Zheng, Chunxiao Cong   +7 more
doaj   +1 more source