2022年1月7日 · The constructed bilayer graphene devices with in-situ dynamical tunability offer opportunities to investigate the twist angle effects in a single device.

2020年11月18日 · Near a magic twist angle, bilayer graphene transforms from a weakly correlated Fermi liquid to a strongly correlated two-dimensional electron system with properties that are extraordinarily...

2021年9月27日 · Here we apply this technique to study the optical properties of twisted graphene near the magic angle, with a particular focus on the collective excitations related to moiré minibands.

2025年1月27日 · Magic-angle twisted bilayer graphene (MATBG) presents a fascinating platform for investigating the effects of electron interactions in topological flat bands. The Bistritzer-MacDonald (BM) model provides a simplified quantitative description of the flat bands. Introducing long-range Coulomb interactions leads to an interacting BM (IBM) Hamiltonian, a momentum-space continuum description which ...

2023年9月1日 · Owing to its excellent properties in optical and electronic applications, twisted bilayer graphene (TBG) has attracted extensive research attention. As an encapsulation layer, hexagonal boron nitride (h -BN) is indispensable for fabricating TBG devices.

2025年1月14日 · This work reports an optimized protocol for the fabrication of devices made from twisted bilayer graphene with a small twist angle (the so-called magic angle), demonstrating a high device yield of ∼38% and small twist-angle variations, which result in homogeneous properties over areas as large as 36 μm 2.

2024年4月15日 · However, the twist angle of twisted bilayer graphene (tBLG) is almost unchangeable once the interlayer stacking is determined, while applying mechanical elastic strain provides an alternative way to deeply regulate the electronic structure by controlling the lattice spacing and symmetry.

2020年1月1日 · Among these, twisted bilayer graphene, tBLG, has become archetypical. The twist as a new degree of freedom induces several angle dependent properties in tBLG, from visible absorption to superconductivity, unheard of in the case of graphene itself.

2023年6月8日 · Here we introduce spectroscopic ellipsometric contrast microscopy (SECM) as a tool for mapping twist angle disorder in optically resonant twisted bilayer graphene. We optimize the ellipsometric angles to enhance the image contrast based on measured and calculated reflection coefficients of incident light.

2025年1月28日 · The effect of structure relaxation on the potential energy surface (PES) of interlayer interaction of twisted graphene bilayer is studied for a set of commensurate moir'e systems using the registry-dependent empirical potential of Kolmogorov and Crespi.