Results 41 to 50 of about 3,336 (157)

Superconductivity and topological quantum states in two-dimensional moiré superlattices

Quantum Frontiers
Moiré superlattices have emerged as an excellent platform for investigating a plethora of exotic quantum states in condensed matter physics. Recent advancements have unveiled abundant discoveries in two-dimensional moiré superlattices.
Chuanqi Zheng, Xiaoxue Liu
doaj   +1 more source

Strain-induced Evolution of Electronic Band Structures in a Twisted Graphene Bilayer

, 2013
Here we study the evolution of local electronic properties of a twisted graphene bilayer induced by a strain and a high curvature. The strain and curvature strongly affect the local band structures of the twisted graphene bilayer; the energy difference ...
A Altland, A Isacsson, A Luican, AF Young, AH Castro Neto, AS Mayorov, B Nanda, B Verberck, B Wang, C-H Park, C-H Park, D Guo, DL Miller, E Cerda, E Cerda, E Cerda, E Marinani, E McCann, E-A Kim, EY Andrei, F de Juan, F de Juan, F Guinea, F Guinea, F Guinea, F Guinea, G Li, G Semenoff, GM Rutter, H Yan, H Yan, I Brihuega, J Hicks, JMB Lopes dos Santos, K Kim, KK Gomes, KS Novoselov, L Meng, L Meng, M Killi, M Mucha-Kruczyński, M Sicot, M Sicot, M Yankowitz, MAH Vozmediano, N Levy, P Ghaemi, P San-Jose, SM Choi, T Gao, T Ohta, VH Pereira, VM Pereira, W Yan, Y Zhang, Z Li, Z-D Chu, ZF Wang   +57 more
core   +1 more source

High-order fractal states in graphene superlattices [PDF]

, 2018
Graphene superlattices were shown to exhibit high-temperature quantum oscillations due to periodic emergence of delocalized Bloch states in high magnetic fields such that unit fractions of the flux quantum pierce a superlattice unit cell.
A. K. Geim, A. Mishchenko, Beenakker, Chen, G. H. Auton, Hofstadter, Ju, L. A. Ponomarenko, L. Eaves, Landau, Moon, R. Krishna Kumar, S. Pezzini, Schubnikow, Streda, U. Zeitler, V. I. Fal’ko, Wallbank, Wang, Wannier, Wannier, X. Chen   +21 more
core   +4 more sources

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

Spatially resolved electronic structure of twisted graphene [PDF]

, 2017
We have used scanning tunneling microscopy and spectroscopy to resolve the spatial variation of the density of states of twisted graphene layers on top of a highly oriented pyrolytic graphite substrate.
Bampoulis, Pantelis, de Boeij, Paul L., Haartsen, Sebastiaan, Slotman, Guus J., Sotthewes, Kai, van Bremen, Rik, van Houselt, Arie, Yao, Qirong, Yuan, Shengjun, Zandvliet, Harold J. W., Zhang, Lijie   +10 more
core   +4 more sources

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

Observation of Γ-Valley Moiré Bands and Emergent Hexagonal Lattice in Twisted Transition Metal Dichalcogenides

Physical Review X, 2022
Twisted van der Waals heterostructures have recently been proposed as a condensed-matter platform for realizing controllable quantum models due to the low-energy moiré bands with specific charge distributions moiré superlattices.
Ding Pei, Binbin Wang, Zishu Zhou, Zhihai He, Liheng An, Shanmei He, Cheng Chen, Yiwei Li, Liyang Wei, Aiji Liang, Jose Avila, Pavel Dudin, Viktor Kandyba, Alessio Giampietri, Mattia Cattelan, Alexei Barinov, Zhongkai Liu, Jianpeng Liu, Hongming Weng, Ning Wang, Jiamin Xue, Yulin Chen   +21 more
doaj   +1 more source

Electrically tunable topological transport of moir\'e polaritons

, 2020
Moir\'e interlayer exciton in transition metal dichalcogenide heterobilayer features a permanent electric dipole that enables the electrostatic control of its flow, and optical dipole that is spatially varying in the moir\'e landscape.
Yao, Wang, Yu, Hongyi
core   +1 more source

2D Nanomaterials Toward Function‐Ready Superlubricity in Advanced Microsystems

Advanced Materials, EarlyView.
A unified framework links structural and transformation superlubricity with microsystem functions and deployment requirements. Mechanisms, device architectures, integration strategies, AI‐guided discovery, and benchmarking protocols are connected to define function‐ready superlubricity in advanced microsystems.
Yushan Geng, Jun Yang, Yong Yang
wiley   +1 more source

Anti-Symmetric Electromagnetic Interactions’ Response in Electron Circular Dichroism and Chiral Origin of Periodic, Complementary Twisted Angle in Twisted Bilayer Graphene

Molecules, 2022
Many novel physical properties of twisted bilayer graphene have been discovered and studied successively, but the physical mechanism of the chiral modulation of BLG by a twisted angle lacks theoretical research.
Guoqiang Dai, Xiangtao Chen, Ying Jin, Jingang Wang   +3 more
doaj   +1 more source