156 citations · 679 across the 30 of their papers we have counts for
15 papers · 1 filter
Realization of 2/3-layer transition metal dichalcogenides
Ya-Xin Zhao, Zi-Yi Han, Ya-Ning Ren +4
Layered van der Waals transition metal dichalcogenides (TMDCs), generally composed of three atomic X-M-X planes in each layer (M = transition metal, X = chalcogen), provide versati…
Characterization and manipulation of intervalley scattering induced by an individual monovacancy in graphene
Yu Zhang, Fei Gao, Shiwu Gao +2
Intervalley scattering involves microscopic processes that electrons are scattered by atomic-scale defects on nanometer length scales. Although central to our understanding of elec…
Recent advances of defect-induced spin and valley polarized states in graphene
Yu Zhang, Liangguang Jia, Yaoyao Chen +2
Electrons in graphene have fourfold spin and valley degeneracies owing to the unique bipartite honeycomb lattice and an extremely weak spin-orbit coupling, which can support a seri…
Oscillations of van Hove singularities spacing induced by sub-Angstrom fluctuations of interlayer spacing in graphene superlattices
Ya-Xin Zhao, Xiao-Feng Zhou, Yu Zhang +1
Physical properties of two-dimensional van der Waals (vdWs) structures depend sensitively on both stacking orders and interlayer interactions. Yet, in most cases studied to date, t…
Local Measurements of Shubnikov-de Haas Oscillations in Graphene Systems
Ya-Ning Ren, Mo-Han Zhang, Chao Yan +2
Shubnikov-de Haas (SdH) oscillations, the most well-known magneto-oscillations caused by the quantization of electron energy levels in the presence of magnetic fields in two-dimens…
Tunable lattice reconstruction and bandwidth of flat bands in magic-angle twisted bilayer graphene
Yi-Wen Liu, Ying Su, Xiao-Feng Zhou +10
The interplay between interlayer van der Waals interaction and intralayer lattice distortion can lead to structural reconstruction in slightly twisted bilayer graphene (TBG) with t…
Nanoscale Probing of Broken-Symmetry States in Graphene Induced by Individual Atomic Impurities
Yu Zhang, Qi-Qi Guo, Si-Yu Li +1
Inherent symmetries of a system lead to multiple degeneracies of its energy spectra. Introducing individual atomic impurities can locally break these symmetries, which is expected…
Scanning tunneling microscope characterizations of a circular graphene resonator realized with p-p junctions
Ya-Ning Ren, Jiao-Jiao Zhou, Zhong-Qiu Fu +11
Using low-temperature high-magnetic-field scanning tunneling microscopy and spectroscopy (STM/STS), we systematically study a graphene quantum dot (GQD) defined by a circular graph…
Relativistic Artificial Molecules Realized by Two Coupled Graphene Quantum Dots
Zhong-Qiu Fu, Yue-Ting Pan, Jiao-Jiao Zhou +6
Coupled quantum dots (QDs), usually referred to as artificial molecules, are important not only in exploring fundamental physics of coupled quantum objects, but also in realizing a…
STM Study of Quantum Hall Isospin Ferromagnetic States of Zero Landau Level in Graphene Monolayer
Si-Yu Li, Yu Zhang, Long-Jing Yin +1
A number of quantum Hall isospin ferromagnetic (QHIFM) states have been predicted in the relativistic zero Landau level (LL) of graphene monolayer. These states, especially the sta…
Magnetism near half-filling of a van Hove singularity in twisted graphene bilayer
Yi-Wen Liu, Jia-Bin Qiao, Chao Yan +3
Twisted graphene bilayers (TGBs) have low-energy van Hove singularities (VHSs) that are strongly localized around AA-stacked regions of the moire pattern. Therefore, they exhibit n…
Spatial Confinement, Magnetic Localization and Their Interactions on Massless Dirac Fermions
Zhong-Qiu Fu, Yu Zhang, Jia-Bin Qiao +8
It is of keen interest to researchers understanding different approaches to confine massless Dirac fermions in graphene, which is also a central problem in making electronic device…
Scanning tunneling microscopy and spectroscopy of nanoscale twisted bilayer graphene
Wen-Xiao Wang, Hua Jiang, Yu Zhang +5
Nanoscale twisted bilayer graphene (TBG) is quite instable and will change its structure to Bernal (or AB-stacking) bilayer with a much lower energy. Therefore, the lack of nanosca…
Landau quantization of Dirac fermions in graphene and its multilayer
Long-jing Yin, Ke-ke Bai, Wen-xiao Wang +3
When electrons are confined in a two dimensional (2D) system, typical quantum mechanical phenomena such as Landau quantization can be detected. Graphene systems, including the sing…
Experimental Observation of Surface States and Landau Levels Bending in Bilayer Graphene
Long-Jing Yin, Yu Zhang, Jia-Bin Qiao +2
We report on microscopic measurements of the low-energy electronic structures both at zigzag and armchair edges of bilayer graphene using scanning tunneling microscopy and spectros…