Logic Circuits w/ Spin Wave Bus - A.Khitun UCLA

Abstract: There is an impetus for the development of novel logic devices for information processing in line with scaled CMOS and beyond in order to provide high signal processing rate and be scaleable to the nanometer range. Logic circuits utilizing spin waves as a physical mechanism for information transmission and processing is an alternative solution to the traditional CMOS-based architectures. The novelty of this approach is that information transmission is accomplished without charge transfer. A bit of information is encoded into the phase of spin wave propagating in a ferromagnetic film - Spin Wave Bus. The communication between the Spin Wave Bus and outer devices is performed in a wireless manner via a magnetic field. I will present our experimental data on spin wave excitation/detection in 100nm thick NiFe and CoFe films obtained at room temperature. The performance of logic circuits is illustrated by numerical modeling based on the obtained experimental results. Potentially, logic circuits with Spin Wave Bus may be beneficial in reducing power consumption and subsequently resolve the interconnect problem. According to the numerical estimates the minimum energy per bit can be as low as 10-17J. Another anticipated benefit is in the enhanced logic functionality. The shortcomings and limitations of the logic circuits with Spin Wave Bus will be discussed.
Bio: Alexander Khitun received the Ph.D. degree in applied physics and mathematics from the Moscow Institute of Physics and Technology in 1995. He is an Assistant Research Engineer in Electrical Engineering Department at UCLA leading a group of graduate students in two research projects supported by MURI and DARPA. His research interests include Spintronics, Nanotechnology in application to novel logic devices, and Phonon Engineering.

Location: Henry Salvatori Computer Science Center (SAL) - 322

Audiences: Everyone Is Invited

Contact: Shane Goodoff