News and Announcements from the VINO Group

    Golam Received Olsen Fellowship

    November 04, 2023

    VINO member Golam Morshed has been awarded the 2023-24 Endowed Graduate Fellowships (Olsen Fellowship) by UVA Engineering based on academic excellence and demonstrated scholarship. Congrats to Golam! 

    New Paper Published

    June 19, 2023

    Yunkun's paper entitled "Anatomy of nanomagnetic switching at a 3D topological insulator PN junction (link)" published in Scientific Reports. In this paper, Y. Xie et al. analyze how spins filtered at an in-plane topological insulator PN junction (TIPNJ) interact with a nanomagnet, and argue that the intrinsic charge-to-spin conversion does not translate to an external gain if the nanomagnet also acts as the source contact.

    New Paper Published

    June 10, 2023

    Golam's paper entitled "A Deep Dive Into the Computational Fidelity of High-Variability Low Energy Barrier Magnet Technology for Accelerating Optimization and Bayesian Problems (link)" published in IEEE Magnetics Letters. In this paper, G. Morshed et al. show the impact of non-idealities on computational networks built from low-barrier magnets (LBMs). The results suggest although the switching process is fully stochastic for LBMs, the margin of error introduced by various non-idealities, i.e., characteristics distortion and energy-barrier variation, is almost always certifiable to a certain percentage.

    New Paper Published

    May 14, 2023

    Golam's paper entitled "Choose your tools carefully: a comparative evaluation of deterministic vs. stochastic and binary vs. analog neuron models for implementing emerging computing paradigms (link)" published in Frontiers in Nanotechnology. In this paper, G. Morshed et al. show a comparative analysis between analog and binary neuron models (including stochasticity) for analog time-series prediction tasks. The results suggest analog stochastic neuron (ASN) model shows better performance metrics, i.e., inference errors, generalizability and robustness, practical implementability, and memory capacity, than its binary counterpart.

    New Paper Published

    January 02, 2023

    Hamed's paper entitled "Low Power In-Memory Computation with Reciprocal Ferromagnet/Topological Insulator Heterostructures (link)" published in ACS Nano. In this paper, H. Vakili et al. show the use of two ferromagnet (FM)/topological insulation (TI) heterostructures to design an integrated 1-transistor 1-magnetic tunnel junction magnetic (1T-1MTJ) random access memory unit (MRAM) for an ultra-low power Processing-in-Memory (PiM) architecture.

    New Paper Published

    June 14, 2022

    Golam's recent paper entitled "Positional Stability of Skyrmions in a Racetrack Memory with Notched Geometry (link)" published in Physical Review Applied. Hamed Vakili shared equal authorship in this paper. In this paper, we solve micromagnetic equations to simulate skyrmion trajectories and extract quasi-analytical equations for their energy barrier and their dependence on the material and geometrical properties of the racetrack. Our numerical study shows that it is indeed possible to create constrictions designed along a racetrack that can hold the skyrmions in place long enough for meaningful information storage, yet easily cleared with a modest current pulse.

    Dr. Ganguly joined VCU

    June 13, 2022

    Dr. Samiran Ganguly, our former post-doc, recently joined the Virginia Commonwealth University as a research associate. A big congratulations to Dr. Ganguly!

    Hamed joined the University of Nebraska–Lincoln

    June 13, 2022

    Hamed Vakili, a recent graduate from our group joined the University of Nebraska–Lincoln as a post-doc. A big congratulations to Dr. Vakili!

    Success celebration of VINO alumni (late upload)

    June 13, 2022

    We celebrated Hamed's dissertation defense and Sheikh's hooding ceremony lately. Congratulations once again to them. Also, we bid farewell to our post-doc Dr. Samiran Ganguly. Best wishes to all three for their new placement.