Results 61 to 70 of about 360,605 (265)

Effects of lithium intercalation in twisted bilayer graphene [PDF]

Physical Review B, 2020
7 pages, 4 ...
Daniel T. Larson, Stephen Carr, Georgios A. Tritsaris, Efthimios Kaxiras   +3 more
openaire   +2 more sources

Covalent Functionalization of 2D Semiconductors: A Roadmap to Advanced Electronic Devices

Advanced Functional Materials, EarlyView.
This Review presents recent advances in the covalent functionalization strategies for two‐dimensional semiconductors and their implementation in modern technologies. Layered materials are modified through diverse molecular chemistries (e.g., thiols, diazonium salts, alkyl halides, and electron‐deficient species) to tailor their surface properties ...
Ramiro Quirós‐Ovies, Bin Han, Paolo Samorì   +2 more
wiley   +1 more source

Observation of dichotomic field-tunable electronic structure in twisted monolayer-bilayer graphene

Nature Communications
Twisted bilayer graphene (tBLG) provides a fascinating platform for engineering flat bands and inducing correlated phenomena. By designing the stacking architecture of graphene layers, twisted multilayer graphene can exhibit different symmetries with ...
Hongyun Zhang, Qian Li, Youngju Park, Yujin Jia, Wanying Chen, Jiaheng Li, Qinxin Liu, Changhua Bao, Nicolas Leconte, Shaohua Zhou, Yuan Wang, Kenji Watanabe, Takashi Taniguchi, Jose Avila, Pavel Dudin, Pu Yu, Hongming Weng, Wenhui Duan, Quansheng Wu, Jeil Jung, Shuyun Zhou   +20 more
doaj   +1 more source

Optical conductivity of twisted bilayer graphene

Physical Review B, 2013
We calculate the finite-frequency conductivity of bilayer graphene with a relative twist between the layers. The low frequency response at zero doping shows a flat conductivity with value twice that of the monolayer case and at higher frequency a strong absorption peak occurs. For finite doping, the low frequency flat absorption is modified into a peak
Tabert, Calvin J., Nicol, Elisabeth J.
openaire   +3 more sources

Spectroscopy of Twisted Bilayer Graphene Correlated Insulators

Physical Review Letters, 2022
We analytically compute the scanning tunneling microscopy (STM) signatures of integer-filled correlated ground states of the magic angle twisted bilayer graphene (TBG) narrow bands. After experimentally validating the strong-coupling approach at $\pm 4$ electrons/moiré unit cell, we consider the spatial features of the STM signal for 14 different many ...
Călugăru, Dumitru, Regnault, Nicolas, Oh, Myungchul, Nuckolls, Kevin P., Wong, Dillon, Lee, Ryan L., Yazdani, Ali, Vafek, Oskar, Bernevig, B. Andrei   +8 more
openaire   +3 more sources

Universal Conductance Fluctuations in Quantum Anomalous Hall Insulators

Advanced Materials, EarlyView.
Universal conductance fluctuations are observed in mesoscopic quantum anomalous Hall insulators. Two distinct fluctuation patterns are identified, arising from different interference processes of bulk and chiral edge states, respectively. These findings unveil rich quantum interference phenomena in quantum anomalous Hall insulators and provide insights
Peng Deng, Peng Zhang, Gang Qiu, Ting‐Hsun Yang, Chang Niu, Yaochen Li, Wenqiang Cui, Yang Feng, Peide D. Ye, Ke He, Kai Chang, Kang L. Wang   +11 more
wiley   +1 more source

Magic distances in twisted bilayer graphene

npj 2D Materials and Applications
Twisted bilayer graphene exhibits isolated, relatively flat electronic bands near charge neutrality when the interlayer rotation is tuned to specific magic angles. These small misalignments, typically below 1.1°, result in long-period moiré patterns with
Antonio Palamara, Michele Pisarra, Antonello Sindona   +2 more
doaj   +1 more source

Optical Hall response of bilayer graphene: Manifestation of chiral hybridized states in broken mirror symmetry lattices

Physical Review Research, 2020
Understanding the mechanisms governing the optical activity of layered-stacked materials is crucial to the design of devices aimed at manipulating light at the nanoscale.
V. Nam Do, H. Anh Le, V. Duy Nguyen, D. Bercioux   +3 more
doaj   +1 more source

Magic-angle twisted bilayer systems with quadratic band touching: Exactly flat bands with high Chern number

Physical Review Research, 2022
Studies of twisted moiré systems have been mainly focused on two-dimensional (2D) materials such as graphene with Dirac points and transition-metal dichalcogenides so far.
Ming-Rui Li, Ai-Lei He, Hong Yao
doaj   +1 more source

Weak localization and antilocalization in twisted bilayer graphene

Physical Review B, 2023
In this study, we investigate the weak localization (WL) and weak antilocalization (WAL) effects in twisted bilayer graphene positioned on a hexagonal boron nitride substrate. The bottom graphene layer aligns with the hexagonal boron nitride. The top layer of the system features a Dirac cone with a negligible gap, while the bottom layer possesses a ...
Hongyi Yan, Haiwen Liu
openaire   +2 more sources