写在前面 关于Twisted Bilayer Graphene (TGB)的哈密顿量推导,可直接参看Bistritzer和MacDonald在PNAS上的原文。更详细的推导可以参照发表在Wiley Online Library上的Handbook of Graphene Set-Vol8-chapter6。(其第八卷第六章也即里斯本大学的G.Catarina的硕士毕业论文)。总得来说在写TGB的哈密顿量时,有两个关键的...
关于Twisted Bilayer Graphene (TGB)的哈密顿量推导，主要涉及能带折叠和层间跃迁项的处理。首先，能带折叠是由于扭曲导致的Moiré图样带来的晶胞扩大，这种扩大使得能带在小的布里渊区中折叠。能带折叠可以通过在小的倒格矢上对能带进行平移来实现，对应于在不同的Bloch基底下进行对角化哈密顿量。对于层间...
Twisted bilayer graphene (TBG) has emerged as a fascinating research frontier in condensed matter physics and materials science. This review article comprehensively overviews recent advances and future perspectives in studying TBG. The challenges associated with fabricating and characterizing TBG structures, ...
Recently, twisted bilayer graphene (tBLG), which is composed of two graphene layers with an interlayer twist angle (θ)1, has emerged as an exciting material for both fundamental studies and practical applications because of its uniqueθ-dependent properties2,3. Specifically, the presence of twist...
The computer code used for the dataset processing and strain analysis has been made publicly available at https://github.com/bediakolab/StrainFieldsInTwistedBilayerGraphene. References Balents, L., Dean, C. R., Efetov, D. K. & Young, A. F. Superconductivity and strong correlations in moiré...
Twisted bilayer graphene is a two-dimensional moiré superlattice material formed by simple twisting of two stacked layers of graphene. This material exhibits a series of exotic physical properties dictated by the superlattice structure, such as superconducting, magnetic, and localized states. These prope...
内容提示: Interacting models for twisted bilayer graphene: a quantum chemistryapproachFabian M. Faulstich, 1, ∗ Kevin D. Stubbs, 1, ∗ Qinyi Zhu, 1, ∗ Tomohiro Soejima, 2 Rohit Dilip, 3Huanchen Zhai, 3 Raehyun Kim, 1 Michael P. Zaletel, 2 Garnet Kin-Lic Chan, 3 and Lin ...
Machine learningTwisted bilayer grapheneRaman spectroscopyThe vibrational properties of twisted bilayer graphene (tBLG) show complex features, due to the intricate energy landscape of its low-symmetry configurations. A machine learning-based approach is developed to provide a continuous model between the ...
Twisted bilayer graphene with a twist angle of around 1.1° features a pair of isolated flat electronic bands and forms a platform for investigating strongly correlated electrons. Here, we use scanning tunnelling microscopy to probe the local properties of highly tunable twisted bilayer graphene devices...
Our results point to the dominant role of electron–phonon scattering in twisted bilayer graphene, with possible implications for the origin of the observed superconductivity.doi:10.1038/s41567-019-0596-3Hryhoriy PolshynMatthew YankowitzShaowen Chen...