Department of Mathematical and Computer Sciences, Physical Sciences and Earth Sciences, University of Messina

报告摘要：

The development of more efficient and high performance spintronic devices and the efforts to have co-integration of spintronics with CMOS technology is driving the development of hybrid CMOS-spintronic solutions for application where one can take the advantages of both technologies while minimizing their disadvantages. In this talk, I will focus on our recent developments on new potential applications of magnetic tunnel junctions (MTJs) as compact sensors for IoT nodes and computing applications. I will discuss how MTJs can be used to develop compact and more effective accelerometers and physical unclonable functions for security applications. I will also discuss our recent results on spintronic microwave amplifiers which are based on the phenomenon of injection locking. In this first part of the talk, I will discuss about a single MTJ spinking neuron which does not need any reset mechanism after the spiking and it is equivalent in term of behavior to what described by the Hodgkin-Huxley model.

In the second part of the talk I will focus on probabilistic computing with probabilistic-bits (p-bits) which is emerging as a computational paradigm able to be competitive in solving NP-hard combinatorial problems. I will show how to map hard combinatorial optimization problems (Max-Sat, Max-Cut, Traveling Salesman problem) into probabilistic Ising machine by using the idea if invertible logic gates and more complex energy mapping approaches and how to implement those in spintronic and CMOS technology. We will investigate the potential of advanced annealing schemes comparing simulated annealing, parallel-tempering, and simulated-quantum-annealing and how it will be possible to implement an efficient probabilistic co-processor.

报告人简介：

Giovanni Finocchio received the Ph.D. degree in advanced technologies in optoelectronic, photonic and electromagnetic modeling from the University of Messina, Italy, in 2005. He is full professor at the Department of Mathematical and Computer Sciences, Physical Sciences and Earth Sciences of the University of Messina. His main research directions are spintronics, skyrmionics and unconventional computing publishing more than 200 papers on those topics. He is director of the laboratory PETASPIN (Petascale computing and Spintronics) at Messina leading several research fundings. In the last 10 years, he served on many technical program committees of international conferences and organized more than 10 international conferences and workshops as Chair, Program Committee Member, or in other positions including school in magnetism (IEEE Magnetics summer school in 2023) and spintronics. Currently, he is program co-chair of the Joint MMM-Intermag conference 2025.

地点：M236会议室

邀请人：于国强

电话: 010-82649215

邮箱：guoqiangyu@iphy.ac.cn