UVA-UT Austin Research Team Earns Grant to Achieve Efficiencies in Fiber Optics for Telecommunications
A $500,000 NSF research grant adds to the team’s modeling and measurement work over the next three years.
At the Virginia Nano-Computing Research Group, our focus is on understanding non-equilibrium properties of nano-scale material structures. Our work applies a combined understanding of fundamental physics , chemistry, material science, and device engineering to explore novel device concepts.
We also explore and utilize high performance computational resources including the use numerical algorithms to advance our understanding of nanoscale science and engineering. To address the challenges of extending today’s electronic devices to the next generation of devices, science can no longer work out of context to engineering, but rather both should work in tandem. The interdisciplinary nature of our approach is necessary to explain the science and push the engineering of future devices.
A $500,000 NSF research grant adds to the team’s modeling and measurement work over the next three years.
Team develops state-of-the-art computational models and collaborates with experimentalists to understand the limits of various low-...
Nanomagnetism research team engineers skyrmions in quest to simultaneously increase memory, processing speed and power economy for...
Watch how UVA Engineering researchers bridge computing with new materials.
Research in our group has the advantage of being both curiosity driven and needs driven. Industry is always looking for ways to design or utilize novel materials and devices for new applications. To that end, our research focuses on three aspects of nanoelectronic modeling and simulation:
Traditional CAD tools for electronic conduction are based on macroscopic concepts such as mobility and diffusion that do not apply at nanometer length scales. We look at fundamental physics of current flow including impacts of quantum interference, topological symmetry, inelastic scattering, ‘friction’ and heating due to vibrations and spins, strong non-equilibrium many-body effects, and time-dependent effects due to hysteretic switching, memory, decoherence and noise. Topics include (a) Topological switching such as in skyrmions, pseudospins in graphene, and spins in topological insulators/semi-metals, (b) Unconventional electron-optics such as Veselago effects, Klein/Anti-Klein tunneling, and (c) impact of entanglement.
Here we develop the formal evolution equations into quantitative simulation tools. This includes semi-empirical as well as ‘first principles’ methods for capturing chemistry, bandstructure and transport, describing the nano-channels and contact surfaces atomistically. Special attention is aimed at multiscaling, band-inversion and embedding techniques to describe hetero-interfaces and surface states, as in hybrid molecule-silicon devices. Examples include band-engineering in III-V tunnel devices and avalanche photodiodes (quarternary digital alloys), thermal engineering at interfaces, and magnetic material design (e.g. Heusler half-metals).
Here we combine the formal equations with numerical simulations to identify performance advantages and limitations of nanoscale devices and design unconventional computing paradigms, such as tunneling diodes and transistors, ultrafast switches, conductors, interconnects, transistors and electronic sensors made out of various materials such as organic, nanotubes, nanowires, spintronic or magnetic elements and silicon quantum dots. Part of our current interests involve exploring hybrid devices operating on novel principles, such as Klein tunnel transistors for subthremal switching and RF applications, magnet based stochastic computing, and magnetic excitation (skyrmion) based temporal memory.
All of this work is built on a bedrock of non-equilibrium quantum transport, which is our main focus.