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Hace 3 días · However, they usually suffer from a low photoresponsivity due to weak optical absorption. In this work, we have implemented SiPh-integrated twisted bilayer graphene (tBLG) detectors and reported a ...
Hace 2 días · View PDF HTML (experimental) Abstract: Using molecular simulation and continuum dielectric theory, we consider how electrochemical kinetics are modulated as a function of twist angle in bilayer graphene electrodes. By establishing an effective connection between twist angle and the screening length of charge carriers within the electrode, we investigate how tunable metallicity can result in ...
Hace 2 días · Here, we report on the effective manipulation of the two mechanisms in a single graphene moiré superlattice, AB-BA stacked twisted double bilayer graphene. Most saliently, by virtue of the high tunability of moiré band structures and scattering rates, a record-high second-order transverse conductivity ∼ 510 μm S V –1 is observed, which is orders of magnitude higher than any reported ...
Hace 3 días · Graphene photodetectors have exhibited high bandwidth and capability of being integrated with silicon photonics (SiPh), holding promise for future optical communication devices. However, they usually suffer from a low photoresponsivity due to weak optical absorption. In this work, we have implemented SiPh-integrated twisted bilayer graphene (tBLG) detectors and reported a responsivity of 0.65 ...
Hace 3 días · However, such a strategy has yet to be established. To address this critical issue, a combination of density functional theory and non-equilibrium Green's function is employed to calculate the SOT in various 2D vdW bilayer heterostructures. This leads to the discovery of three high SOT systems: WTe 2 /CrSe 2, MoTe 2 /VS 2, and NbSe 2 /CrSe 2.
Hace 4 días · The Cu step bunches formed during the synthesis of graphene by chemical vapor deposition (CVD) have been intensively studied to optimize the electrical and mechanical properties of graphene. For example, it has been reported that the compressive strain due to the mismatch between the thermal expansion coefficients of Cu and graphene tends to be released by forming periodic steps depending on ...
Hace 3 días · The observation of tunable mid-IR bulk photovoltaic effect at 5 and 7.7μm in twisted double bilayer graphene (TDBG), arising from the moir´e-induced strong symmetry breaking and quantum geometric contribution, is reported.
