Publications (12)
Exploiting negative differential resistance in monolayer graphene FETs for high voltage gains
Roberto Grassi, Antonio Gnudi, Valerio Di Lecce +3
Through self-consistent quantum transport simulations, we evaluate the RF performance of monolayer graphene FETs in the bias region of negative output differential resistance. We s…
Mid-infrared Electro-Optic Modulation in Few-layer Black Phosphorus
Ruoming Peng, Kaveh Khaliji, Nathan Youngblood +3
Black phosphorus stands out from the family of two-dimensional materials as a semiconductor with a direct, layer-dependent bandgap in energy corresponding to the spectral range fro…
Enhanced interlayer neutral excitons and trions in trilayer van der Waals heterostructures
Chanyeol Choi, Jiahui Huang, Hung-Chieh Cheng +11
Vertically stacked van der Waals heterostructures constitute a promising platform for providing tailored band alignment with enhanced excitonic systems. Here we report observations…
Large-scale defects hidden inside a topological insulator grown onto a 2D substrate
Danielle Reifsnyder Hickey, Ryan J. Wu, Joon Sue Lee +7
Topological insulator (TI) materials are exciting candidates for integration into next-generation memory and logic devices because of their potential for efficient, low-energy-cons…
Semi-analytical model of the contact resistance in two-dimensional semiconductors
Roberto Grassi, Yanqing Wu, Steven J. Koester +1
Contact resistance is a severe performance bottleneck for electronic devices based on two-dimensional layered (2D) semiconductors, whose contacts are Schottky rather than Ohmic. Al…
Contact-induced negative differential resistance in short-channel graphene FETs
Roberto Grassi, Tony Low, Antonio Gnudi +1
In this work, we clarify the physical mechanism for the phenomenon of negative output differential resistance (NDR) in short-channel graphene FETs (GFETs) through non-equilibrium G…