A5114910887- Ferroelectric and Negative Capacitance Devices
- Advanced Memory and Neural Computing
- Caching and Content Delivery
- Semiconductor materials and devices
- Advancements in Semiconductor Devices and Circuit Design
- MXene and MAX Phase Materials
- Metal-Organic Frameworks: Synthesis and Applications
- Quantum and electron transport phenomena
- Magnetism in coordination complexes
- Polyoxometalates: Synthesis and Applications
- Advanced Bandit Algorithms Research
- Magnetic Bearings and Levitation Dynamics
- Metal complexes synthesis and properties
- Recommender Systems and Techniques
University of Notre Dame
2012-2024
Machine learning and data analytics applications increasingly suffer from the high latency energy consumption of conventional von Neumann architectures. Recently, several in-memory near-memory systems have been proposed to overcome this bottleneck. Platforms based on content-addressable memories (CAMs) are particularly interesting due their efficient support for search-based operations that form foundation many applications, including K-nearest neighbors (KNN), high-dimensional computing...
Recommendation systems (RecSys) suggest items to users by predicting their preferences based on historical data. Typical RecSys handle large embedding tables and many table related operations. The memory size bandwidth of the conventional computer architecture restrict performance RecSys. This work proposes an in-memory-computing (IMC) (iMARS) for accelerating filtering ranking stages deep neural network-based iMARS leverages IMC-friendly implemented inside a ferroelectric FET IMC fabric....
Low-cost content-addressable memories (CAMs) are highly desirable for many applications where high-speed search is needed such as network routers and machine learning. We propose a low-power, compact, fast magnetic skyrmion-based ternary CAM (Sky-TCAM) cell design. Each comprises 5T2R structure with five transistors two tunnel junctions (MTJs). The current polarity together the stored bit can realize XOR logic. When mismatch happens, skyrmion appears beneath one MTJ, leading to discharge of...
Hydrothermal reactions of benzenehexacarboxylic acid, also known as mellitic and transition metal cations in the presence N-donor ancillary ligands afford five novel coordination polymers with general formula [M2(H2mel)(L)(H2O)6]·nH2O, where M = Co, L 2,2′-bpy (1); 4,4′-bpy (2a); Ni, (2b); tpt (3a); (3b). The structures were determined by single-crystal X-ray diffraction. Powder diffraction (PXRD), elemental analysis, IR spectroscopy, magnetic measurements carried out for some compounds. All...
Benzenehexacarboxylic acid, also known as mellitic reacts readily with cobalt and manganese chlorides to afford a new series of coordination polymers. Three them are mellitates (1–3) synthesized at different conditions, i.e. either room temperature (1) or hydrothermally 140 (2) 180 °C (3), the last two in presence organic bases. While compound 1 exhibits chains held together by inter-chain hydrogen bonds, compounds 2 3 three-dimensional could be expected from synthetic conditions. The latter...
Energy-harvesting internet-of-things devices must deal with unstable power input. Nonvolatile processors (NVPs) can offer an effective solution. Compact and low-energy arithmetic circuits that efficiently switch between computation backup operations are highly desirable for NVP design. This paper introduces a nonvolatile ferroelectric field-effect transistors (FeFET)-based sequential multiplier the ability to do continued calculation after outage, thus achieving zero overhead. We exploit...
In Part I of this article, we present a novel device, i.e., cross-coupled gated tunneling diode (XTD), which exhibits negative differential resistance (NDR) with peak-to-valley current ratios (PVCRs) exceeding 105. part based on the XTD, introduce compact static random access memory (SRAM) cell using one-transistor and two-XTD (1T-2X) design. The layout SRAM as well detailed analysis behavior array performance are presented. particular, our simulation results show that 1T-2X can achieve...
Configurable memory arrays (CMAs) execute various operations (e.g., searches, table lookups, Boolean logic) in one in-memory-computing (IMC) structure and can benefit many applications. Emerging non-volatile devices, e.g., Ferroelectric FET (FeFETs) lead to denser, lower-energy CMAs. This paper presents FeFET-based CMAs demonstrates the utility of CMA-based IMC architectures via application case studies.
Tunnel diodes (TDs) and resonant tunneling (RTDs) with negative differential resistance (NDR) have attracted interest in implementing high-density, low-power circuits, such as static random access memory (SRAM). However, the low peak-to-valley current ratios (PVCRs) these devices cause high leakage currents, leading to poor performance circuits limiting their application. This article presents a novel device, i.e., cross-coupled gated diode (XTD), that exhibits NDR PVCRs exceeding...
A new composite analog circuit absorbing structure is designed by combining magnetic material with structure. Through adjusting the amplitude of electromagnetic wave, total low frequency band reduced 10 dB. Good absorption effect achieved in angle range 0 ~ 70. It expected that this will play a key role control radiation.
Recommendation systems (RecSys) suggest items to users by predicting their preferences based on historical data. Typical RecSys handle large embedding tables and many table related operations. The memory size bandwidth of the conventional computer architecture restrict performance RecSys. This work proposes an in-memory-computing (IMC) (iMARS) for accelerating filtering ranking stages deep neural network-based iMARS leverages IMC-friendly implemented inside a ferroelectric FET IMC fabric....