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Hot-carrier photocurrent effects at graphene-metal interfaces
K. J. Tielrooij, M. Massicotte, L. Piatkowski +5
Photoexcitation of graphene leads to an interesting sequence of phenomena, some of which can be exploited in optoelectronic devices based on graphene. In particular, the efficient…
Electrical Control of Optical Emitter Relaxation Pathways enabled by Graphene
K. J. Tielrooij, L. Orona, A. Ferrier +16
Controlling the energy flow processes and the associated energy relaxation rates of a light emitter is of high fundamental interest, and has many applications in the fields of quan…
Electrostatic Coupling between Two Surfaces of a Topological Insulator Nanodevice
Valla Fatemi, Benjamin Hunt, Hadar Steinberg +8
We report on electronic transport measurements of dual-gated nano-devices of the low-carrier density topological insulator Bi1.5Sb0.5Te1.7Se1.3. In all devices the upper and lower…
Band Structure Mapping of Bilayer Graphene via Quasiparticle Scattering
Matthew Yankowitz, Joel I-Jan Wang, Suchun Li +7
A perpendicular electric field breaks the layer symmetry of Bernal-stacked bilayer graphene, resulting in the opening of a band gap and a modification of the effective mass of the…
Competing Channels for Hot Electron Cooling in Graphene
Qiong Ma, Nathaniel M. Gabor, Trond I. Andersen +4
We report on temperature dependent photocurrent measurements of high-quality dual-gated monolayer graphene (MLG) p-n junction devices. A photothermoelectric (PTE) effect governs th…
Electric Field Control of Soliton Motion and Stacking in Trilayer Graphene
Matthew Yankowitz, Joel I-Jan Wang, A. Glen Birdwell +7
The crystal structure of a material plays an important role in determining its electronic properties. Changing from one crystal structure to another involves a phase transition whi…