micro/nano engineering

Exploring a Novel, Nanoscale Thermal Switch

ANN ARBOR—Thermal switches that can effectively control the flow of heat are key to enabling a number of applications ranging from the thermal management of nanoscale devices, refrigeration, data storage, thermal computing all the way to the thermal management of buildings. However, in comparison to the vast array of devices, e.g. transistors and diodes, available to control the flow of electricity there exists currently very few proposals for controlling the flow of heat, especially at the nanoscale.

New Paper Published in Nature Communications titled, "Exact exchange-correlation potentials from ground-state electron densities"

For decades now density functional theory (DFT) has been used to break down complicated higher-dimensional many-electron wavefunctions into just single-electron orbitals. The root of the simplification lies in the exchange-correlation (XC) potential, which encapsulates the quantum many-electron interactions, aka how they talk to one another. However, in practice, DFT has remained far from exact due to the unavailability of exact XC potentials, thereby, necessitating the use of approximations.