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Home | Seminars and Symposia | Past seminars/symposia: Monday, May 19, 2008

DTC Seminar Series

Novel Electronic and Spintronic Devices for Low Power Computing


Sayeef Salahuddin
Purdue University

Monday, May 19, 2008
2:00 pm

405 Walter Library

Our computers are heating up. The frequent droning of the cooling fans in our desktops to the whole range of fancy cooling pads available for laptops — all testify to this fact. But rather than being just a matter of mere discomfort, the heating in the computers has a much more serious consequence. The microchips can only work properly up to a certain temperature. The level of heating is now catching up with the capacity of our cooling methods and it has been predicted that this will severely restrict the benefits of scaling the downsizing of physical dimensions that has fuelled the exponential growth of microchip industry so far. In this presentation, I shall talk about a few electronic and spintronic devices geared towards low power computing. Specifically, I shall discuss a novel concept of using interacting systems for switching applications. The results show that such systems are fundamentally different and can operate with a level of dissipation that is orders of magnitude smaller in comparison to conventional devices. As a specific example of this concept, I shall discuss how a ferroelectric insulator, when used as a gate of a MOSFET may reduce the subthreshold swing below the fundamental limit of 60 mV/decade without affecting the ON current at all. Finally, I shall briefly discuss how non equilibrium phenomena in nanostructures are opening up an exciting array of novel applications.


Sayeef Salahuddin has recently completed his PhD from the school of Electrical and Computer Engineering at the Purdue University, where he is currently a post doctoral research associate. He received his B.Sc. in Electrical and Electronic Engineering from BUET (Bangladesh University of Engineering and Technology) in 2003 with the Kintarul Islam Gold Medal. His research interests are in the novel electronic and spintronic devices for low power logic and memory applications. He pioneered the concept of using interacting systems for switching, showing fundamental advantage of such systems over the conventional devices in terms of power dissipation. Sayeef has worked at the IBM Almaden Research Center as a research intern during summer 2007 and was the recipient of IBM PhD Fellowship 2007–08. He also received a MARCO/FCRP Inventor Recognition Award in 2007.