514 citations · 890 across the 16 of their papers we have counts for
16 papers
Observation of well-defined Kohn-anomaly in high-quality graphene devices at room temperature
Andreij C. Gadelha, Rafael Nadas, Tiago C. Barbosa +5
Due to its ultra-thin nature, the study of graphene quantum optoelectronics, like gate-dependent graphene Raman properties, is obscured by interactions with substrates and surround…
Raman spectra of twisted bilayer graphene close to the magic angle
Tiago C. Barbosa, Andreij C. Gadelha, Douglas A. A. Ohlberg +5
In this work, we study the Raman spectra of twisted bilayer graphene samples as a function of their twist-angles (), ranging from 0.03 to 3.40, where local a…
The limits of Near Field Immersion Microwave Microscopy evaluated by imaging bilayer graphene Moiré patterns
Douglas A. A. Ohlberg, Diego Tami, Andreij C. Gadelha +11
Molecular and atomic imaging required the development of electron and scanning probe microscopies to surpass the physical limits dictated by diffraction. Nano-infrared experiments…
Gate-tunable non-volatile photomemory effect in MoS transistors
Andreij C. Gadelha, Alisson R. Cadore, Kenji Watanabe +5
Non-volatile memory devices have been limited to flash architectures that are complex devices. Here, we present a unique photomemory effect in MoS transistors. The photomemory…
Local photodoping in monolayer MoS2
Andreij C. Gadelha, Alisson R. Cadore, Lucas Lafeta +4
Inducing electrostatic doping in 2D materials by laser exposure (photodoping effect) is an exciting route to tune optoelectronic phenomena. However, there is a lack of investigatio…
Lattice dynamics localization in low-angle twisted bilayer graphene
Andreij C. Gadelha, Douglas A. A. Ohlberg, Cassiano Rabelo +20
A low twist angle between the two stacked crystal networks in bilayer graphene enables self-organized lattice reconstruction with the formation of a periodic domain. This superlatt…