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24 papers
Signature of Correlated Insulator in Electric Field Controlled Superlattice
Jiacheng Sun, Sayed Ali Akbar Ghorashi, Kenji Watanabe +4
The Bloch electron energy spectrum of a crystalline solid is determined by the underlying lattice structure at the atomic level. In a 2-dimensional (2d) crystal it is possible to i…
Topological and stacked flat bands in bilayer graphene with a superlattice potential
Sayed Ali Akbar Ghorashi, Aaron Dunbrack, Ahmed Abouelkomsan +3
We show that bilayer graphene in the presence of a 2D superlattice potential provides a highly tunable setup that can realize a variety of flat band phenomena. We focus on two regi…
In Situ Study of the Impact of Aberration-Corrected Electron-Beam Lithography on the Electronic Transport of Suspended Graphene Devices
Naomi Mizuno, Fernando Camino, Xu Du
The implementation of aberration-corrected electron beam lithography (AC-EBL) in a 200 keV scanning transmission electron microscope (STEM) is a novel technique that could be used…
Contact transparency in mechanically assembled 2D material devices
Scott Mills, Naomi Mizuno, Peng Wang +6
Two-dimensional atomic crystals (2DACs) can be mechanically assembled with precision for the fabrication of heterostructures, allowing for the combination of material building bloc…
Dirac Fermion Quantum Hall Antidot in Graphene
Scott Mills, Anna Gura, Kenji Watanabe +4
The ability to localize and manipulate individual quasiparticles in mesoscopic structures is critical in experimental studies of quantum mechanics and thermodynamics, and in potent…
Detecting the Major Charge-Carrier Scattering Mechanism in Graphene Antidot Lattices
Dongchao Xu, Shuang Tang, Xu Du +1
Charge carrier scattering is critical to the electrical properties of two-dimensional materials such as graphene, transition metal dichalcogenide monolayers, black phosphorene, and…