IAS / School of Engineering Joint Lecture - Phononic Thermal Transport in Low Dimensional Micro and Nano Systems: Anomalous is Normal
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Abstract
Heat transfer in a macroscopic system follows three principles: (1) Fourier Law of heat conduction: heat flux density is proportional to the product of temperature gradient and thermal conductivity, where the later depends on materials composite and temperature, it is independent of system size and geometry; (2) Reciprocal Principle: when the temperature gradient is reversed, the amplitude of heat current density remains the same; (3) Positive differential thermal resistance: the larger the temperature gradient the larger the heat current density.
In this lecture, the speaker will discuss in detail how these three basic principles can be broken in low dimensional micro and nano systems. They call the thermal transport violating these three principles anomalous thermal transport, and will show that the anomalous in micro and nano scale is quite general, and moreover these anomalities can be used to build thermal diode and thermal transistor to control heat flux.
About the Speaker
Prof. LI Baowen is currently a Chair Professor jointly appointed by the Department of Physics and the Department of Materials Science and Engineering at the Southern University of Science and Technology (SUSTech). Before joining SUSTech, he served as an endowed Professor in the Department of Mechanical Engineering and the Department of Physics at the University of Colorado, Boulder from 2015 to 2023, and as a Professor in the Department of Physics at the National University of Singapore (NUS) from 2000 to 2015.
Prof. Li has been a pioneer in the research of micro and nano scale heat conduction and the field of Phononics. His group at NUS had developed innovative devices such as thermal diodes, thermal transistors, thermal logic gates, and thermal memory. He has published over 400 papers in prestigious journals, including Reviews of Modern Physics and Physical Review Letters. His work has been cited more than 37,000 times and he has an H-index of 100.
Prof. Li is an elected member of Academia Europaea and a Fellow of American Physical Society. He is the recipient of 2005 Singapore National Science Award, 2005 Achievement in Asia Award from the Overseas Chinese Physics Association, and 2017 Brillouin Medal from the International Phononic Society.
For Attendees' Attention
Seating is on a first come, first served basis.