Events

Abstract 

Heat dissipation and thermal management is a rising concern for nanoelectronic devices and threatens to curtail their adoption in integrated circuits, sensors, and energy converters. Joule heating due to dissipation in the channel region of nanoelectronic devices causes increased temperature and may lead to mobility degradation and long-term reliability issues. Two-dimensional (2D) materials have tremendous potential for next-generation nano- and optoelectronics. Here we study thermal transport and cross-plane thermal boundary conductance in a variety of “beyond graphene” 2D materials and few-layer stacks on several amorphous and crystalline substrates using a combination of first principles methods and Boltzmann transport of phonons. We employ machine learning to accelerate the discovery of 2D-substrate pairings with enhanced thermal conductance. Beyond that, we couple electronic and thermal transport to study dissipation in field effect MOS transistors and show that heat dissipation is non-uniform and that self-heating reduces mobility. We find that judicious selection of the number of layers and substrate can significantly reduce the deleterious effects of Joule heating.

About the Speaker

Zlatan is currently an Associate Professor in Materials Science and Engineering at the University of Utah, where he joined in 2022 after having spent over 8 years in the Electrical and Computer Engineering Department at the University of Massachusetts in Amherst. Before that, Zlatan held the NSF CI TraCS postdoctoral fellowship at the University of Wisconsin-Madison, where his research focused on thermoelectric energy conversion and nanoscale heat transfer. Currently, Zlatan leads the NanoEnergy lab where he is developing a deeper understanding electronic transport and thermal management in 2D materials, van der Waals heterostructures, and organic electronics with the goal of improving their electro-thermal performance as well as exploiting nanostructures for more efficient conversion of waste heat energy into useful electricity. Zlatan also serves as the Career Mentoring Fellow with the American Physical Society.